From e3ff7f27c2fd9c9605d477e7cfaa7701a4206294 Mon Sep 17 00:00:00 2001
From: Beatrycze Volk <beatrycze.volk@slub-dresden.de>
Date: Tue, 18 Jun 2024 18:37:04 +0200
Subject: [PATCH] Add functions to get the elements by index of value

Move readers to traits to increase code readability
---
 src/Mods/ModsReader.php                       | 1160 +----------------
 src/Mods/Reader/AbstractReader.php            |   43 +
 src/Mods/Reader/AccessConditionReader.php     |   97 ++
 src/Mods/Reader/ClassificationReader.php      |   96 ++
 src/Mods/Reader/ExtensionReader.php           |   98 ++
 src/Mods/Reader/GenreReader.php               |   97 ++
 src/Mods/Reader/IdentifierReader.php          |   97 ++
 src/Mods/Reader/LanguageReader.php            |   97 ++
 src/Mods/Reader/LocationReader.php            |   97 ++
 src/Mods/Reader/NameReader.php                |   97 ++
 src/Mods/Reader/NoteReader.php                |   97 ++
 src/Mods/Reader/OriginInfoReader.php          |   97 ++
 src/Mods/Reader/PartReader.php                |   97 ++
 src/Mods/Reader/PhysicalDescriptionReader.php |   97 ++
 src/Mods/Reader/RecordInfoReader.php          |   97 ++
 src/Mods/Reader/RelatedItemReader.php         |   97 ++
 src/Mods/Reader/SubjectReader.php             |   97 ++
 src/Mods/Reader/TableOfContentsReader.php     |   97 ++
 src/Mods/Reader/TargetAudienceReader.php      |   97 ++
 src/Mods/Reader/TitleInfoReader.php           |   97 ++
 src/Mods/Reader/TypeOfResourceReader.php      |   43 +
 21 files changed, 1861 insertions(+), 1131 deletions(-)
 create mode 100644 src/Mods/Reader/AbstractReader.php
 create mode 100644 src/Mods/Reader/AccessConditionReader.php
 create mode 100644 src/Mods/Reader/ClassificationReader.php
 create mode 100644 src/Mods/Reader/ExtensionReader.php
 create mode 100644 src/Mods/Reader/GenreReader.php
 create mode 100644 src/Mods/Reader/IdentifierReader.php
 create mode 100644 src/Mods/Reader/LanguageReader.php
 create mode 100644 src/Mods/Reader/LocationReader.php
 create mode 100644 src/Mods/Reader/NameReader.php
 create mode 100644 src/Mods/Reader/NoteReader.php
 create mode 100644 src/Mods/Reader/OriginInfoReader.php
 create mode 100644 src/Mods/Reader/PartReader.php
 create mode 100644 src/Mods/Reader/PhysicalDescriptionReader.php
 create mode 100644 src/Mods/Reader/RecordInfoReader.php
 create mode 100644 src/Mods/Reader/RelatedItemReader.php
 create mode 100644 src/Mods/Reader/SubjectReader.php
 create mode 100644 src/Mods/Reader/TableOfContentsReader.php
 create mode 100644 src/Mods/Reader/TargetAudienceReader.php
 create mode 100644 src/Mods/Reader/TitleInfoReader.php
 create mode 100644 src/Mods/Reader/TypeOfResourceReader.php

diff --git a/src/Mods/ModsReader.php b/src/Mods/ModsReader.php
index 0a299e2..6fae14d 100644
--- a/src/Mods/ModsReader.php
+++ b/src/Mods/ModsReader.php
@@ -12,27 +12,27 @@
 
 namespace Slub\Mods;
 
-use Slub\Mods\Element\AbstractElement;
-use Slub\Mods\Element\AccessCondition;
-use Slub\Mods\Element\Classification;
-use Slub\Mods\Element\Extension;
-use Slub\Mods\Element\Genre;
-use Slub\Mods\Element\Identifier;
-use Slub\Mods\Element\Language;
-use Slub\Mods\Element\Location;
-use Slub\Mods\Element\Name;
-use Slub\Mods\Element\Note;
-use Slub\Mods\Element\OriginInfo;
-use Slub\Mods\Element\Part;
-use Slub\Mods\Element\PhysicalDescription;
-use Slub\Mods\Element\RecordInfo;
-use Slub\Mods\Element\RelatedItem;
-use Slub\Mods\Element\Subject;
-use Slub\Mods\Element\TableOfContents;
-use Slub\Mods\Element\TargetAudience;
-use Slub\Mods\Element\TitleInfo;
-use Slub\Mods\Element\TypeOfResource;
 use Slub\Mods\Element\Xml\Element;
+use Slub\Mods\Reader\AbstractReader;
+use Slub\Mods\Reader\AccessConditionReader;
+use Slub\Mods\Reader\ClassificationReader;
+use Slub\Mods\Reader\ExtensionReader;
+use Slub\Mods\Reader\GenreReader;
+use Slub\Mods\Reader\IdentifierReader;
+use Slub\Mods\Reader\LanguageReader;
+use Slub\Mods\Reader\LocationReader;
+use Slub\Mods\Reader\NameReader;
+use Slub\Mods\Reader\NoteReader;
+use Slub\Mods\Reader\OriginInfoReader;
+use Slub\Mods\Reader\PartReader;
+use Slub\Mods\Reader\PhysicalDescriptionReader;
+use Slub\Mods\Reader\RecordInfoReader;
+use Slub\Mods\Reader\RelatedItemReader;
+use Slub\Mods\Reader\SubjectReader;
+use Slub\Mods\Reader\TableOfContentsReader;
+use Slub\Mods\Reader\TargetAudienceReader;
+use Slub\Mods\Reader\TitleInfoReader;
+use Slub\Mods\Reader\TypeOfResourceReader;
 
 /**
  * Metadata MODS reader class for the 'php-mods-reader' library.
@@ -42,6 +42,9 @@
  */
 class ModsReader
 {
+
+    use AbstractReader, AccessConditionReader, ClassificationReader, ExtensionReader, GenreReader, IdentifierReader, LanguageReader, LocationReader, NameReader, NoteReader, OriginInfoReader, PartReader, PhysicalDescriptionReader, RecordInfoReader, RelatedItemReader, SubjectReader, TableOfContentsReader, TargetAudienceReader, TitleInfoReader, TypeOfResourceReader;
+
     /**
      * @access protected
      * @var \SimpleXMLElement The metadata XML
@@ -63,1122 +66,17 @@ public function __construct(\SimpleXMLElement $xml)
     }
 
     /**
-     * Get the value of the <abstract> element.
-     * @see https://www.loc.gov/standards/mods/userguide/abstract.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?AbstractElement
-     */
-    public function getAbstract(string $query = ''): ?AbstractElement
-    {
-        $xpath = './mods:abstract' . $query;
-        $element = new Element($this->xml, $xpath);
-        if ($element->exists()) {
-            return new AbstractElement($element->getValues()[0]);
-        }
-        return null;
-    }
-
-    /**
-     * Get the the array of the <accessCondition> elements.
-     * @see https://www.loc.gov/standards/mods/userguide/accesscondition.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return AccessCondition[]
-     */
-    public function getAccessConditions(string $query = ''): array
-    {
-        $accessConditions = [];
-        $xpath = './mods:accessCondition' . $query;
-        $element = new Element($this->xml, $xpath);
-        foreach ($element->getValues() as $value) {
-            $accessConditions[] = new AccessCondition($value);
-        }
-        return $accessConditions;
-    }
-
-    /**
-     * Get the the first matching <accessCondition> element.
-     * @see https://www.loc.gov/standards/mods/userguide/accesscondition.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?AccessCondition
-     */
-    public function getFirstAccessCondition(string $query = ''): ?AccessCondition
-    {
-        $elements = $this->getAccessConditions($query);
-        if (count($elements) > 0) {
-            return $elements[0];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the last matching <accessCondition> element.
-     * @see https://www.loc.gov/standards/mods/userguide/accesscondition.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?AccessCondition
-     */
-    public function getLastAccessCondition(string $query = ''): ?AccessCondition
-    {
-        $elements = $this->getAccessConditions($query);
-        $count = count($elements);
-        if ($count > 0) {
-            return $elements[$count - 1];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the array of the <classification> elements.
-     * @see https://www.loc.gov/standards/mods/userguide/classification.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return Classification[]
-     */
-    public function getClassifications(string $query = ''): array
-    {
-        $classifications = [];
-        $xpath = './mods:classification' . $query;
-        $element = new Element($this->xml, $xpath);
-        foreach ($element->getValues() as $value) {
-            $classifications[] = new Classification($value);
-        }
-        return $classifications;
-    }
-
-    /**
-     * Get the the first matching <classification> element.
-     * @see https://www.loc.gov/standards/mods/userguide/classification.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Classification
-     */
-    public function getFirstClassification(string $query = ''): ?Classification
-    {
-        $elements = $this->getClassifications($query);
-        if (count($elements) > 0) {
-            return $elements[0];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the last matching <classification> element.
-     * @see https://www.loc.gov/standards/mods/userguide/classification.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Classification
-     */
-    public function getLastClassification(string $query = ''): ?Classification
-    {
-        $elements = $this->getClassifications($query);
-        $count = count($elements);
-        if ($count > 0) {
-            return $elements[$count - 1];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the array of the <extension> elements.
-     * @see https://www.loc.gov/standards/mods/userguide/extension.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return Extension[]
-     */
-    public function getExtensions(string $query = ''): array
-    {
-        $extensions = [];
-        $xpath = './mods:extension' . $query;
-        $element = new Element($this->xml, $xpath);
-        foreach ($element->getValues() as $value) {
-            $extensions[] = new Extension($value);
-        }
-        return $extensions;
-    }
-
-    /**
-     * Get the the first matching <extension> element.
-     * @see https://www.loc.gov/standards/mods/userguide/extension.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Extension
-     */
-    public function getFirstExtension(string $query = ''): ?Extension
-    {
-        $elements = $this->getExtensions($query);
-        if (count($elements) > 0) {
-            return $elements[0];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the last matching <extension> element.
-     * @see https://www.loc.gov/standards/mods/userguide/extension.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Extension
-     */
-    public function getLastExtension(string $query = ''): ?Extension
-    {
-        $elements = $this->getExtensions($query);
-        $count = count($elements);
-        if ($count > 0) {
-            return $elements[$count - 1];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the array of the <genre> elements.
-     * @see https://www.loc.gov/standards/mods/userguide/genre.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return Genre[]
-     */
-    public function getGenres(string $query = ''): array
-    {
-        $genres = [];
-        $xpath = './mods:genre' . $query;
-        $element = new Element($this->xml, $xpath);
-        foreach ($element->getValues() as $value) {
-            $genres[] = new Genre($value);
-        }
-        return $genres;
-    }
-
-    /**
-     * Get the the first matching <genre> element.
-     * @see https://www.loc.gov/standards/mods/userguide/genre.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Genre
-     */
-    public function getFirstGenre(string $query = ''): ?Genre
-    {
-        $elements = $this->getGenres($query);
-        if (count($elements) > 0) {
-            return $elements[0];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the last matching <genre> element.
-     * @see https://www.loc.gov/standards/mods/userguide/genre.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Genre
-     */
-    public function getLastGenre(string $query = ''): ?Genre
-    {
-        $elements = $this->getGenres($query);
-        $count = count($elements);
-        if ($count > 0) {
-            return $elements[$count - 1];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the array of the <identifier> elements.
-     * @see https://www.loc.gov/standards/mods/userguide/identifier.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return Identifier[]
-     */
-    public function getIdentifiers(string $query = ''): array
-    {
-        $identifiers = [];
-        $xpath = './mods:identifier' . $query;
-        $element = new Element($this->xml, $xpath);
-        foreach ($element->getValues() as $value) {
-            $identifiers[] = new Identifier($value);
-        }
-        return $identifiers;
-    }
-
-    /**
-     * Get the the first matching <identifier> element.
-     * @see https://www.loc.gov/standards/mods/userguide/identifier.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Identifier
-     */
-    public function getFirstIdentifier(string $query = ''): ?Identifier
-    {
-        $elements = $this->getIdentifiers($query);
-        if (count($elements) > 0) {
-            return $elements[0];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the last matching <identifier> element.
-     * @see https://www.loc.gov/standards/mods/userguide/identifier.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Identifier
-     */
-    public function getLastIdentifier(string $query = ''): ?Identifier
-    {
-        $elements = $this->getIdentifiers($query);
-        $count = count($elements);
-        if ($count > 0) {
-            return $elements[$count - 1];
-        }
-        return null;
-    }
-
-    /**
-     * Get the array of the <language> elements.
-     * @see https://www.loc.gov/standards/mods/userguide/language.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return Language[]
-     */
-    public function getLanguages(string $query = ''): array
-    {
-        $languages = [];
-        $xpath = './mods:language' . $query;
-        $element = new Element($this->xml, $xpath);
-        foreach ($element->getValues() as $value) {
-            $languages[] = new Language($value);
-        }
-        return $languages;
-    }
-
-    /**
-     * Get the the first matching <language> element.
-     * @see https://www.loc.gov/standards/mods/userguide/language.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Language
-     */
-    public function getFirstLanguage(string $query = ''): ?Language
-    {
-        $elements = $this->getLanguages($query);
-        if (count($elements) > 0) {
-            return $elements[0];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the last matching <language> element.
-     * @see https://www.loc.gov/standards/mods/userguide/language.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Language
-     */
-    public function getLastLanguage(string $query = ''): ?Language
-    {
-        $elements = $this->getLanguages($query);
-        $count = count($elements);
-        if ($count > 0) {
-            return $elements[$count - 1];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the array of the <location> elements.
-     * @see https://www.loc.gov/standards/mods/userguide/location.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return Location[]
-     */
-    public function getLocations(string $query = ''): array
-    {
-        $locations = [];
-        $xpath = './mods:location' . $query;
-        $element = new Element($this->xml, $xpath);
-        foreach ($element->getValues() as $value) {
-            $locations[] = new Location($value);
-        }
-        return $locations;
-    }
-
-    /**
-     * Get the the first matching <location> element.
-     * @see https://www.loc.gov/standards/mods/userguide/location.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Location
-     */
-    public function getFirstLocation(string $query = ''): ?Location
-    {
-        $elements = $this->getLocations($query);
-        if (count($elements) > 0) {
-            return $elements[0];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the last matching <location> element.
-     * @see https://www.loc.gov/standards/mods/userguide/location.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Location
-     */
-    public function getLastLocation(string $query = ''): ?Location
-    {
-        $elements = $this->getLocations($query);
-        $count = count($elements);
-        if ($count > 0) {
-            return $elements[$count - 1];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the array of the <name> elements.
-     * @see https://www.loc.gov/standards/mods/userguide/name.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return Name[]
-     */
-    public function getNames(string $query = ''): array
-    {
-        $names = [];
-        $xpath = './mods:name' . $query;
-        $element = new Element($this->xml, $xpath);
-        foreach ($element->getValues() as $value) {
-            $names[] = new Name($value);
-        }
-        return $names;
-    }
-
-    /**
-     * Get the the first matching <name> element.
-     * @see https://www.loc.gov/standards/mods/userguide/name.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Name
-     */
-    public function getFirstName(string $query = ''): ?Name
-    {
-        $elements = $this->getNames($query);
-        if (count($elements) > 0) {
-            return $elements[0];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the last matching <name> element.
-     * @see https://www.loc.gov/standards/mods/userguide/name.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Name
-     */
-    public function getLastName(string $query = ''): ?Name
-    {
-        $elements = $this->getNames($query);
-        $count = count($elements);
-        if ($count > 0) {
-            return $elements[$count - 1];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the array of the <note> elements.
-     * @see https://www.loc.gov/standards/mods/userguide/note.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return Note[]
-     */
-    public function getNotes(string $query = ''): array
-    {
-        $notes = [];
-        $xpath = './mods:note' . $query;
-        $element = new Element($this->xml, $xpath);
-        foreach ($element->getValues() as $value) {
-            $notes[] = new Note($value);
-        }
-        return $notes;
-    }
-
-    /**
-     * Get the the first matching <note> element.
-     * @see https://www.loc.gov/standards/mods/userguide/note.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Note
-     */
-    public function getFirstNote(string $query = ''): ?Note
-    {
-        $elements = $this->getNotes($query);
-        if (count($elements) > 0) {
-            return $elements[0];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the last matching <note> element.
-     * @see https://www.loc.gov/standards/mods/userguide/note.html
+     * Get array of values for read element.
      *
-     * @access public
+     * @access private
      *
-     * @param string $query for metadata search
-     *
-     * @return ?Note
-     */
-    public function getLastNote(string $query = ''): ?Note
-    {
-        $elements = $this->getNotes($query);
-        $count = count($elements);
-        if ($count > 0) {
-            return $elements[$count - 1];
-        }
-        return null;
-    }
-
-     /**
-     * Get the the array of the <originInfo> elements.
-     * @see https://www.loc.gov/standards/mods/userguide/origininfo.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return OriginInfo[]
-     */
-    public function getOriginInfos(string $query = ''): array
-    {
-        $originInfos = [];
-        $xpath = './mods:originInfo' . $query;
-        $element = new Element($this->xml, $xpath);
-        foreach ($element->getValues() as $value) {
-            $originInfos[] = new OriginInfo($value);
-        }
-        return $originInfos;
-    }
-
-    /**
-     * Get the the first matching <originInfo> element.
-     * @see https://www.loc.gov/standards/mods/userguide/origininfo.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?OriginInfo
-     */
-    public function getFirstOriginInfo(string $query = ''): ?OriginInfo
-    {
-        $elements = $this->getOriginInfos($query);
-        if (count($elements) > 0) {
-            return $elements[0];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the last matching <originInfo> element.
-     * @see https://www.loc.gov/standards/mods/userguide/origininfo.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?OriginInfo
-     */
-    public function getLastOriginInfo(string $query = ''): ?OriginInfo
-    {
-        $elements = $this->getOriginInfos($query);
-        $count = count($elements);
-        if ($count > 0) {
-            return $elements[$count - 1];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the array of the <part> elements.
-     * @see https://www.loc.gov/standards/mods/userguide/part.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return Part[]
-     */
-    public function getParts(string $query = ''): array
-    {
-        $parts = [];
-        $xpath = './mods:part' . $query;
-        $element = new Element($this->xml, $xpath);
-        foreach ($element->getValues() as $value) {
-            $parts[] = new Part($value);
-        }
-        return $parts;
-    }
-
-    /**
-     * Get the the first matching <part> element.
-     * @see https://www.loc.gov/standards/mods/userguide/part.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Part
-     */
-    public function getFirstPart(string $query = ''): ?Part
-    {
-        $elements = $this->getParts($query);
-        if (count($elements) > 0) {
-            return $elements[0];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the last matching <part> element.
-     * @see https://www.loc.gov/standards/mods/userguide/part.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Part
-     */
-    public function getLastPart(string $query = ''): ?Part
-    {
-        $elements = $this->getParts($query);
-        $count = count($elements);
-        if ($count > 0) {
-            return $elements[$count - 1];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the array of the <physicalDescription> elements.
-     * @see https://www.loc.gov/standards/mods/userguide/physicaldescription.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return PhysicalDescription[]
-     */
-    public function getPhysicalDescriptions(string $query = ''): array
-    {
-        $physicalDescriptions = [];
-        $xpath = './mods:physicalDescription' . $query;
-        $element = new Element($this->xml, $xpath);
-        foreach ($element->getValues() as $value) {
-            $physicalDescriptions[] = new PhysicalDescription($value);
-        }
-        return $physicalDescriptions;
-    }
-
-    /**
-     * Get the the first matching <physicalDescription> element.
-     * @see https://www.loc.gov/standards/mods/userguide/physicaldescription.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?PhysicalDescription
-     */
-    public function getFirstPhysicalDescription(string $query = ''): ?PhysicalDescription
-    {
-        $elements = $this->getPhysicalDescriptions($query);
-        if (count($elements) > 0) {
-            return $elements[0];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the last matching <physicalDescription> element.
-     * @see https://www.loc.gov/standards/mods/userguide/physicaldescription.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?PhysicalDescription
-     */
-    public function getLastPhysicalDescription(string $query = ''): ?PhysicalDescription
-    {
-        $elements = $this->getPhysicalDescriptions($query);
-        $count = count($elements);
-        if ($count > 0) {
-            return $elements[$count - 1];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the array of the <recordInfo> elements.
-     * @see https://www.loc.gov/standards/mods/userguide/recordinfo.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return RecordInfo[]
-     */
-    public function getRecordInfos(string $query = ''): array
-    {
-        $recordInfos = [];
-        $xpath = './mods:recordInfo' . $query;
-        $element = new Element($this->xml, $xpath);
-        foreach ($element->getValues() as $value) {
-            $recordInfos[] = new RecordInfo($value);
-        }
-        return $recordInfos;
-    }
-
-    /**
-     * Get the the first matching <recordInfo> element.
-     * @see https://www.loc.gov/standards/mods/userguide/recordinfo.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?RecordInfo
-     */
-    public function getFirstRecordInfo(string $query = ''): ?RecordInfo
-    {
-        $elements = $this->getRecordInfos($query);
-        if (count($elements) > 0) {
-            return $elements[0];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the last matching <recordInfo> element.
-     * @see https://www.loc.gov/standards/mods/userguide/recordinfo.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?RecordInfo
-     */
-    public function getLastRecordInfo(string $query = ''): ?RecordInfo
-    {
-        $elements = $this->getRecordInfos($query);
-        $count = count($elements);
-        if ($count > 0) {
-            return $elements[$count - 1];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the array of the <relatedItem> elements.
-     * @see https://www.loc.gov/standards/mods/userguide/relateditem.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return RelatedItem[]
-     */
-    public function getRelatedItems(string $query = ''): array
-    {
-        $relatedItems = [];
-        $xpath = './mods:relatedItem' . $query;
-        $element = new Element($this->xml, $xpath);
-        foreach ($element->getValues() as $value) {
-            $relatedItems[] = new RelatedItem($value);
-        }
-        return $relatedItems;
-    }
-
-    /**
-     * Get the the first matching <relatedItem> element.
-     * @see https://www.loc.gov/standards/mods/userguide/relateditem.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?RelatedItem
-     */
-    public function getFirstRelatedItem(string $query = ''): ?RelatedItem
-    {
-        $elements = $this->getRelatedItems($query);
-        if (count($elements) > 0) {
-            return $elements[0];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the last matching <relatedItem> element.
-     * @see https://www.loc.gov/standards/mods/userguide/relateditem.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?RelatedItem
-     */
-    public function getLastRelatedItem(string $query = ''): ?RelatedItem
-    {
-        $elements = $this->getRelatedItems($query);
-        $count = count($elements);
-        if ($count > 0) {
-            return $elements[$count - 1];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the array of the <subject> elements.
-     * @see https://www.loc.gov/standards/mods/userguide/subject.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return Subject[]
-     */
-    public function getSubjects(string $query = ''): array
-    {
-        $subjects = [];
-        $xpath = './mods:subject' . $query;
-        $element = new Element($this->xml, $xpath);
-        foreach ($element->getValues() as $value) {
-            $subjects[] = new Subject($value);
-        }
-        return $subjects;
-    }
-
-    /**
-     * Get the the first matching <subject> element.
-     * @see https://www.loc.gov/standards/mods/userguide/subject.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Subject
-     */
-    public function getFirstSubject(string $query = ''): ?Subject
-    {
-        $elements = $this->getSubjects($query);
-        if (count($elements) > 0) {
-            return $elements[0];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the last matching <subject> element.
-     * @see https://www.loc.gov/standards/mods/userguide/subject.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?Subject
-     */
-    public function getLastSubject(string $query = ''): ?Subject
-    {
-        $elements = $this->getSubjects($query);
-        $count = count($elements);
-        if ($count > 0) {
-            return $elements[$count - 1];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the array of the <tableOfContents> elements.
-     * @see https://www.loc.gov/standards/mods/userguide/tableofcontents.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return TableOfContents[]
-     */
-    public function getTableOfContents(string $query = ''): array
-    {
-        $tableOfContents = [];
-        $xpath = './mods:tableOfContents' . $query;
-        $element = new Element($this->xml, $xpath);
-        foreach ($element->getValues() as $value) {
-            $tableOfContents[] = new TableOfContents($value);
-        }
-        return $tableOfContents;
-    }
-
-    /**
-     * Get the the first matching <tableOfContents> element.
-     * @see https://www.loc.gov/standards/mods/userguide/tableofcontents.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?TableOfContents
-     */
-    public function getFirstTableOfContents(string $query = ''): ?TableOfContents
-    {
-        $elements = $this->getTableOfContents($query);
-        if (count($elements) > 0) {
-            return $elements[0];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the last matching <tableOfContents> element.
-     * @see https://www.loc.gov/standards/mods/userguide/tableofcontents.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?TableOfContents
-     */
-    public function getLastTableOfContents(string $query = ''): ?TableOfContents
-    {
-        $elements = $this->getTableOfContents($query);
-        $count = count($elements);
-        if ($count > 0) {
-            return $elements[$count - 1];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the array of the <targetAudience> elements.
-     * @see https://www.loc.gov/standards/mods/userguide/targetaudience.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return TargetAudience[]
-     */
-    public function getTargetAudiences(string $query = ''): array
-    {
-        $targetAudiences = [];
-        $xpath = './mods:targetAudience' . $query;
-        $element = new Element($this->xml, $xpath);
-        foreach ($element->getValues() as $value) {
-            $targetAudiences[] = new TargetAudience($value);
-        }
-        return $targetAudiences;
-    }
-
-    /**
-     * Get the the first matching <targetAudience> element.
-     * @see https://www.loc.gov/standards/mods/userguide/targetaudience.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?TargetAudience
-     */
-    public function getFirstTargetAudience(string $query = ''): ?TargetAudience
-    {
-        $elements = $this->getTargetAudiences($query);
-        if (count($elements) > 0) {
-            return $elements[0];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the last matching <targetAudience> element.
-     * @see https://www.loc.gov/standards/mods/userguide/targetaudience.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?TargetAudience
-     */
-    public function getLastTargetAudience(string $query = ''): ?TargetAudience
-    {
-        $elements = $this->getTargetAudiences($query);
-        $count = count($elements);
-        if ($count > 0) {
-            return $elements[$count - 1];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the array of the <titleInfo> elements.
-     * @see https://www.loc.gov/standards/mods/userguide/titleinfo.html
-     *
-     * @access public
-     *
-     *  @param string $query for metadata search
-     *
-     * @return TitleInfo[]
-     */
-    public function getTitleInfos(string $query = ''): array
-    {
-        $titleInfos = [];
-        $xpath = './mods:titleInfo' . $query;
-        $element = new Element($this->xml, $xpath);
-        foreach ($element->getValues() as $value) {
-            $titleInfos[] = new TitleInfo($value);
-        }
-        return $titleInfos;
-    }
-
-    /**
-     * Get the the first matching <titleInfo> element.
-     * @see https://www.loc.gov/standards/mods/userguide/titleinfo.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?TitleInfo
-     */
-    public function getFirstTitleInfo(string $query = ''): ?TitleInfo
-    {
-        $elements = $this->getTitleInfos($query);
-        if (count($elements) > 0) {
-            return $elements[0];
-        }
-        return null;
-    }
-
-    /**
-     * Get the the last matching <titleInfo> element.
-     * @see https://www.loc.gov/standards/mods/userguide/titleinfo.html
-     *
-     * @access public
-     *
-     * @param string $query for metadata search
-     *
-     * @return ?TitleInfo
-     */
-    public function getLastTitleInfo(string $query = ''): ?TitleInfo
-    {
-        $elements = $this->getTitleInfos($query);
-        $count = count($elements);
-        if ($count > 0) {
-            return $elements[$count - 1];
-        }
-        return null;
-    }
-
-    /**
-     * Get the value of the <typeOfResource> element.
-     * @see https://www.loc.gov/standards/mods/userguide/typeofresource.html
-     *
-     * @access public
-     * 
-     * @param string $query for metadata search
+     * @param string $xpath for metadata search
      *
-     * @return ?TypeOfResource
+     * @return array
      */
-    public function getTypeOfResource(string $query = ''): ?TypeOfResource
+    private function getValues(string $xpath): array
     {
-        $xpath = './mods:typeOfResource' . $query;
         $element = new Element($this->xml, $xpath);
-        if ($element->exists()) {
-            return new TypeOfResource($element->getValues()[0]);
-        }
-        return null;
+        return $element->getValues();
     }
 }
diff --git a/src/Mods/Reader/AbstractReader.php b/src/Mods/Reader/AbstractReader.php
new file mode 100644
index 0000000..db4a034
--- /dev/null
+++ b/src/Mods/Reader/AbstractReader.php
@@ -0,0 +1,43 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\AbstractElement;
+use Slub\Mods\Element\Xml\Element;
+
+/**
+ * Trait for reading Abstract element
+ */
+trait AbstractReader
+{
+
+    /**
+     * Get the value of the <abstract> element.
+     * @see https://www.loc.gov/standards/mods/userguide/abstract.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?AbstractElement
+     */
+    public function getAbstract(string $query = ''): ?AbstractElement
+    {
+        $xpath = './mods:abstract' . $query;
+        $element = new Element($this->xml, $xpath);
+        if ($element->exists()) {
+            return new AbstractElement($element->getFirstValue());
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/AccessConditionReader.php b/src/Mods/Reader/AccessConditionReader.php
new file mode 100644
index 0000000..df74a57
--- /dev/null
+++ b/src/Mods/Reader/AccessConditionReader.php
@@ -0,0 +1,97 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\AccessCondition;
+
+/**
+ * Trait for reading AccessCondition element
+ */
+trait AccessConditionReader
+{
+
+    /**
+     * Get the the array of the <accessCondition> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/accesscondition.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return AccessCondition[]
+     */
+    public function getAccessConditions(string $query = ''): array
+    {
+        $accessConditions = [];
+        $values = $this->getValues('./mods:accessCondition' . $query);
+        foreach ($values as $value) {
+            $accessConditions[] = new AccessCondition($value);
+        }
+        return $accessConditions;
+    }
+
+    /**
+     * Get the matching <accessCondition> element.
+     * @see https://www.loc.gov/standards/mods/userguide/accesscondition.html
+     *
+     * @access public
+     *
+     * @param int $index of the searched element
+     * @param string $query for metadata search
+     *
+     * @return ?AccessCondition
+     */
+    public function getAccessCondition(int $index, string $query = ''): ?AccessCondition
+    {
+        $values = $this->getValues('./mods:accessCondition' . $query);
+        if (array_key_exists($index, $values)) {
+            return new AccessCondition($values[$index]);
+        }
+        return null;
+    }
+
+    /**
+     * Get the the first matching <accessCondition> element.
+     * @see https://www.loc.gov/standards/mods/userguide/accesscondition.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?AccessCondition
+     */
+    public function getFirstAccessCondition(string $query = ''): ?AccessCondition
+    {
+        return $this->getAccessCondition(0, $query);
+    }
+
+    /**
+     * Get the the last matching <accessCondition> element.
+     * @see https://www.loc.gov/standards/mods/userguide/accesscondition.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?AccessCondition
+     */
+    public function getLastAccessCondition(string $query = ''): ?AccessCondition
+    {
+        $elements = $this->getAccessConditions($query);
+        $count = count($elements);
+        if ($count > 0) {
+            return $elements[$count - 1];
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/ClassificationReader.php b/src/Mods/Reader/ClassificationReader.php
new file mode 100644
index 0000000..49df63b
--- /dev/null
+++ b/src/Mods/Reader/ClassificationReader.php
@@ -0,0 +1,96 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\Classification;
+
+/**
+ * Trait for reading Classification element
+ */
+trait ClassificationReader
+{
+    /**
+     * Get the the array of the <classification> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/classification.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return Classification[]
+     */
+    public function getClassifications(string $query = ''): array
+    {
+        $classifications = [];
+        $values = $this->getValues('./mods:classification' . $query);
+        foreach ($values as $value) {
+            $classifications[] = new Classification($value);
+        }
+        return $classifications;
+    }
+
+    /**
+     * Get the matching <classification> element.
+     * @see https://www.loc.gov/standards/mods/userguide/classification.html
+     *
+     * @access public
+     *
+     * @param int $index of the searched element
+     * @param string $query for metadata search
+     *
+     * @return ?Classification
+     */
+    public function getClassification(int $index, string $query = ''): ?Classification
+    {
+        $values = $this->getValues('./mods:classification' . $query);
+        if (array_key_exists($index, $values)) {
+            return new Classification($values[$index]);
+        }
+        return null;
+    }
+
+    /**
+     * Get the the first matching <classification> element.
+     * @see https://www.loc.gov/standards/mods/userguide/classification.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Classification
+     */
+    public function getFirstClassification(string $query = ''): ?Classification
+    {
+        return $this->getClassification(0, $query);
+    }
+
+    /**
+     * Get the the last matching <classification> element.
+     * @see https://www.loc.gov/standards/mods/userguide/classification.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Classification
+     */
+    public function getLastClassification(string $query = ''): ?Classification
+    {
+        $elements = $this->getClassifications($query);
+        $count = count($elements);
+        if ($count > 0) {
+            return $elements[$count - 1];
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/ExtensionReader.php b/src/Mods/Reader/ExtensionReader.php
new file mode 100644
index 0000000..557eff8
--- /dev/null
+++ b/src/Mods/Reader/ExtensionReader.php
@@ -0,0 +1,98 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\Extension;
+use Slub\Mods\Element\Xml\Element;
+
+/**
+ * Trait for reading Extension element
+ */
+trait ExtensionReader
+{
+
+    /**
+     * Get the the array of the <extension> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/extension.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return Extension[]
+     */
+    public function getExtensions(string $query = ''): array
+    {
+        $extensions = [];
+        $values = $this->getValues('./mods:extension' . $query);
+        foreach ($values as $value) {
+            $extensions[] = new Extension($value);
+        }
+        return $extensions;
+    }
+
+    /**
+     * Get the matching <extension> element.
+     * @see https://www.loc.gov/standards/mods/userguide/extension.html
+     *
+     * @access public
+     *
+     * @param int $index of the searched element
+     * @param string $query for metadata search
+     *
+     * @return ?Extension
+     */
+    public function getExtension(int $index, string $query = ''): ?Extension
+    {
+        $values = $this->getValues('./mods:extension' . $query);
+        if (array_key_exists($index, $values)) {
+            return new Extension($values[$index]);
+        }
+        return null;
+    }
+
+    /**
+     * Get the the first matching <extension> element.
+     * @see https://www.loc.gov/standards/mods/userguide/extension.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Extension
+     */
+    public function getFirstExtension(string $query = ''): ?Extension
+    {
+        return $this->getExtension(0, $query);
+    }
+
+    /**
+     * Get the the last matching <extension> element.
+     * @see https://www.loc.gov/standards/mods/userguide/extension.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Extension
+     */
+    public function getLastExtension(string $query = ''): ?Extension
+    {
+        $elements = $this->getExtensions($query);
+        $count = count($elements);
+        if ($count > 0) {
+            return $elements[$count - 1];
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/GenreReader.php b/src/Mods/Reader/GenreReader.php
new file mode 100644
index 0000000..ba08f17
--- /dev/null
+++ b/src/Mods/Reader/GenreReader.php
@@ -0,0 +1,97 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\Genre;
+
+/**
+ * Trait for reading Genre element
+ */
+trait GenreReader
+{
+
+    /**
+     * Get the the array of the <genre> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/genre.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return Genre[]
+     */
+    public function getGenres(string $query = ''): array
+    {
+        $genres = [];
+        $values = $this->getValues('./mods:genre' . $query);
+        foreach ($values as $value) {
+            $genres[] = new Genre($value);
+        }
+        return $genres;
+    }
+
+    /**
+     * Get the matching <genre> element.
+     * @see https://www.loc.gov/standards/mods/userguide/genre.html
+     *
+     * @access public
+     *
+     * @param int $index of the searched element
+     * @param string $query for metadata search
+     *
+     * @return ?Genre
+     */
+    public function getGenre(int $index, string $query = ''): ?Genre
+    {
+        $values = $this->getValues('./mods:genre' . $query);
+        if (array_key_exists($index, $values)) {
+            return new Genre($values[$index]);
+        }
+        return null;
+    }
+
+    /**
+     * Get the the first matching <genre> element.
+     * @see https://www.loc.gov/standards/mods/userguide/genre.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Genre
+     */
+    public function getFirstGenre(string $query = ''): ?Genre
+    {
+        return $this->getGenre(0, $query);
+    }
+
+    /**
+     * Get the the last matching <genre> element.
+     * @see https://www.loc.gov/standards/mods/userguide/genre.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Genre
+     */
+    public function getLastGenre(string $query = ''): ?Genre
+    {
+        $elements = $this->getGenres($query);
+        $count = count($elements);
+        if ($count > 0) {
+            return $elements[$count - 1];
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/IdentifierReader.php b/src/Mods/Reader/IdentifierReader.php
new file mode 100644
index 0000000..8bc6bea
--- /dev/null
+++ b/src/Mods/Reader/IdentifierReader.php
@@ -0,0 +1,97 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\Identifier;
+
+/**
+ * Trait for reading Identifier element
+ */
+trait IdentifierReader
+{
+
+    /**
+     * Get the the array of the <identifier> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/identifier.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return Identifier[]
+     */
+    public function getIdentifiers(string $query = ''): array
+    {
+        $identifiers = [];
+        $values = $this->getValues('./mods:identifier' . $query);
+        foreach ($values as $value) {
+            $identifiers[] = new Identifier($value);
+        }
+        return $identifiers;
+    }
+
+    /**
+     * Get the matching <identifier> element.
+     * @see https://www.loc.gov/standards/mods/userguide/identifier.html
+     *
+     * @access public
+     *
+     * @param int $index of the searched element
+     * @param string $query for metadata search
+     *
+     * @return ?Identifier
+     */
+    public function getIdentifier(int $index, string $query = ''): ?Identifier
+    {
+        $values = $this->getValues('./mods:identifier' . $query);
+        if (array_key_exists($index, $values)) {
+            return new Identifier($values[$index]);
+        }
+        return null;
+    }
+
+    /**
+     * Get the the first matching <identifier> element.
+     * @see https://www.loc.gov/standards/mods/userguide/identifier.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Identifier
+     */
+    public function getFirstIdentifier(string $query = ''): ?Identifier
+    {
+        return $this->getIdentifier(0, $query);
+    }
+
+    /**
+     * Get the the last matching <identifier> element.
+     * @see https://www.loc.gov/standards/mods/userguide/identifier.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Identifier
+     */
+    public function getLastIdentifier(string $query = ''): ?Identifier
+    {
+        $elements = $this->getIdentifiers($query);
+        $count = count($elements);
+        if ($count > 0) {
+            return $elements[$count - 1];
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/LanguageReader.php b/src/Mods/Reader/LanguageReader.php
new file mode 100644
index 0000000..87d9b82
--- /dev/null
+++ b/src/Mods/Reader/LanguageReader.php
@@ -0,0 +1,97 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\Language;
+
+/**
+ * Trait for reading Language element
+ */
+trait LanguageReader
+{
+
+    /**
+     * Get the array of the <language> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/language.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return Language[]
+     */
+    public function getLanguages(string $query = ''): array
+    {
+        $languages = [];
+        $values = $this->getValues('./mods:language' . $query);
+        foreach ($values as $value) {
+            $languages[] = new Language($value);
+        }
+        return $languages;
+    }
+
+    /**
+     * Get the matching <language> element.
+     * @see https://www.loc.gov/standards/mods/userguide/language.html
+     *
+     * @access public
+     *
+     * @param int $index of the searched element
+     * @param string $query for metadata search
+     *
+     * @return ?Language
+     */
+    public function getLanguage(int $index, string $query = ''): ?Language
+    {
+        $values = $this->getValues('./mods:language' . $query);
+        if (array_key_exists($index, $values)) {
+            return new Language($values[$index]);
+        }
+        return null;
+    }
+
+    /**
+     * Get the the first matching <language> element.
+     * @see https://www.loc.gov/standards/mods/userguide/language.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Language
+     */
+    public function getFirstLanguage(string $query = ''): ?Language
+    {
+        return $this->getLanguage(0, $query);
+    }
+
+    /**
+     * Get the the last matching <language> element.
+     * @see https://www.loc.gov/standards/mods/userguide/language.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Language
+     */
+    public function getLastLanguage(string $query = ''): ?Language
+    {
+        $elements = $this->getLanguages($query);
+        $count = count($elements);
+        if ($count > 0) {
+            return $elements[$count - 1];
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/LocationReader.php b/src/Mods/Reader/LocationReader.php
new file mode 100644
index 0000000..1d1a55c
--- /dev/null
+++ b/src/Mods/Reader/LocationReader.php
@@ -0,0 +1,97 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\Location;
+
+/**
+ * Trait for reading Location element
+ */
+trait LocationReader
+{
+
+    /**
+     * Get the the array of the <location> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/location.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return Location[]
+     */
+    public function getLocations(string $query = ''): array
+    {
+        $locations = [];
+        $values = $this->getValues('./mods:location' . $query);
+        foreach ($values as $value) {
+            $locations[] = new Location($value);
+        }
+        return $locations;
+    }
+
+    /**
+     * Get the matching <location> element.
+     * @see https://www.loc.gov/standards/mods/userguide/location.html
+     *
+     * @access public
+     *
+     * @param int $index of the searched element
+     * @param string $query for metadata search
+     *
+     * @return ?Location
+     */
+    public function getLocation(int $index, string $query = ''): ?Location
+    {
+        $values = $this->getValues('./mods:location' . $query);
+        if (array_key_exists($index, $values)) {
+            return new Location($values[$index]);
+        }
+        return null;
+    }
+
+    /**
+     * Get the the first matching <location> element.
+     * @see https://www.loc.gov/standards/mods/userguide/location.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Location
+     */
+    public function getFirstLocation(string $query = ''): ?Location
+    {
+        return $this->getLocation(0, $query);
+    }
+
+    /**
+     * Get the the last matching <location> element.
+     * @see https://www.loc.gov/standards/mods/userguide/location.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Location
+     */
+    public function getLastLocation(string $query = ''): ?Location
+    {
+        $elements = $this->getLocations($query);
+        $count = count($elements);
+        if ($count > 0) {
+            return $elements[$count - 1];
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/NameReader.php b/src/Mods/Reader/NameReader.php
new file mode 100644
index 0000000..0a04275
--- /dev/null
+++ b/src/Mods/Reader/NameReader.php
@@ -0,0 +1,97 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\Name;
+
+/**
+ * Trait for reading Name element
+ */
+trait NameReader
+{
+
+    /**
+     * Get the the array of the <name> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/name.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return Name[]
+     */
+    public function getNames(string $query = ''): array
+    {
+        $names = [];
+        $values = $this->getValues('./mods:name' . $query);
+        foreach ($values as $value) {
+            $names[] = new Name($value);
+        }
+        return $names;
+    }
+
+    /**
+     * Get the matching <name> element.
+     * @see https://www.loc.gov/standards/mods/userguide/name.html
+     *
+     * @access public
+     *
+     * @param int $index of the searched element
+     * @param string $query for metadata search
+     *
+     * @return ?Name
+     */
+    public function getName(int $index, string $query = ''): ?Name
+    {
+        $values = $this->getValues('./mods:name' . $query);
+        if (array_key_exists($index, $values)) {
+            return new Name($values[$index]);
+        }
+        return null;
+    }
+
+    /**
+     * Get the the first matching <name> element.
+     * @see https://www.loc.gov/standards/mods/userguide/name.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Name
+     */
+    public function getFirstName(string $query = ''): ?Name
+    {
+        return $this->getName(0, $query);
+    }
+
+    /**
+     * Get the the last matching <name> element.
+     * @see https://www.loc.gov/standards/mods/userguide/name.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Name
+     */
+    public function getLastName(string $query = ''): ?Name
+    {
+        $elements = $this->getNames($query);
+        $count = count($elements);
+        if ($count > 0) {
+            return $elements[$count - 1];
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/NoteReader.php b/src/Mods/Reader/NoteReader.php
new file mode 100644
index 0000000..3a94415
--- /dev/null
+++ b/src/Mods/Reader/NoteReader.php
@@ -0,0 +1,97 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\Note;
+
+/**
+ * Trait for reading Note element
+ */
+trait NoteReader
+{
+
+    /**
+     * Get the the array of the <note> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/note.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return Note[]
+     */
+    public function getNotes(string $query = ''): array
+    {
+        $notes = [];
+        $values = $this->getValues('./mods:note' . $query);
+        foreach ($values as $value) {
+            $notes[] = new Note($value);
+        }
+        return $notes;
+    }
+
+    /**
+     * Get the matching <note> element.
+     * @see https://www.loc.gov/standards/mods/userguide/note.html
+     *
+     * @access public
+     *
+     * @param int $index of the searched element
+     * @param string $query for metadata search
+     *
+     * @return ?Note
+     */
+    public function getNote(int $index, string $query = ''): ?Note
+    {
+        $values = $this->getValues('./mods:note' . $query);
+        if (array_key_exists($index, $values)) {
+            return new Note($values[$index]);
+        }
+        return null;
+    }
+
+    /**
+     * Get the the first matching <note> element.
+     * @see https://www.loc.gov/standards/mods/userguide/note.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Note
+     */
+    public function getFirstNote(string $query = ''): ?Note
+    {
+        return $this->getNote(0, $query);
+    }
+
+    /**
+     * Get the the last matching <note> element.
+     * @see https://www.loc.gov/standards/mods/userguide/note.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Note
+     */
+    public function getLastNote(string $query = ''): ?Note
+    {
+        $elements = $this->getNotes($query);
+        $count = count($elements);
+        if ($count > 0) {
+            return $elements[$count - 1];
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/OriginInfoReader.php b/src/Mods/Reader/OriginInfoReader.php
new file mode 100644
index 0000000..9737975
--- /dev/null
+++ b/src/Mods/Reader/OriginInfoReader.php
@@ -0,0 +1,97 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\OriginInfo;
+
+/**
+ * Trait for reading OriginInfo element
+ */
+trait OriginInfoReader
+{
+
+    /**
+     * Get the the array of the <originInfo> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/origininfo.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return OriginInfo[]
+     */
+    public function getOriginInfos(string $query = ''): array
+    {
+        $originInfos = [];
+        $values = $this->getValues('./mods:originInfo' . $query);
+        foreach ($values as $value) {
+            $originInfos[] = new OriginInfo($value);
+        }
+        return $originInfos;
+    }
+
+    /**
+     * Get the matching <originInfo> element.
+     * @see https://www.loc.gov/standards/mods/userguide/origininfo.html
+     *
+     * @access public
+     *
+     * @param int $index of the searched element
+     * @param string $query for metadata search
+     *
+     * @return ?OriginInfo
+     */
+    public function getOriginInfo(int $index, string $query = ''): ?OriginInfo
+    {
+        $values = $this->getValues('./mods:originInfo' . $query);
+        if (array_key_exists($index, $values)) {
+            return new OriginInfo($values[$index]);
+        }
+        return null;
+    }
+
+    /**
+     * Get the the first matching <originInfo> element.
+     * @see https://www.loc.gov/standards/mods/userguide/origininfo.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?OriginInfo
+     */
+    public function getFirstOriginInfo(string $query = ''): ?OriginInfo
+    {
+        return $this->getOriginInfo(0, $query);
+    }
+
+    /**
+     * Get the the last matching <originInfo> element.
+     * @see https://www.loc.gov/standards/mods/userguide/origininfo.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?OriginInfo
+     */
+    public function getLastOriginInfo(string $query = ''): ?OriginInfo
+    {
+        $elements = $this->getOriginInfos($query);
+        $count = count($elements);
+        if ($count > 0) {
+            return $elements[$count - 1];
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/PartReader.php b/src/Mods/Reader/PartReader.php
new file mode 100644
index 0000000..e88c71a
--- /dev/null
+++ b/src/Mods/Reader/PartReader.php
@@ -0,0 +1,97 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\Part;
+
+/**
+ * Trait for reading Part element
+ */
+trait PartReader
+{
+
+    /**
+     * Get the the array of the <part> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return Part[]
+     */
+    public function getParts(string $query = ''): array
+    {
+        $parts = [];
+        $values = $this->getValues('./mods:part' . $query);
+        foreach ($values as $value) {
+            $parts[] = new Part($value);
+        }
+        return $parts;
+    }
+
+    /**
+     * Get the matching <part> element.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html
+     *
+     * @access public
+     *
+     * @param int $index of the searched element
+     * @param string $query for metadata search
+     *
+     * @return ?Part
+     */
+    public function getPart(int $index, string $query = ''): ?Part
+    {
+        $values = $this->getValues('./mods:part' . $query);
+        if (array_key_exists($index, $values)) {
+            return new Part($values[$index]);
+        }
+        return null;
+    }
+
+    /**
+     * Get the the first matching <part> element.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Part
+     */
+    public function getFirstPart(string $query = ''): ?Part
+    {
+        return $this->getPart(0, $query);
+    }
+
+    /**
+     * Get the the last matching <part> element.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Part
+     */
+    public function getLastPart(string $query = ''): ?Part
+    {
+        $elements = $this->getParts($query);
+        $count = count($elements);
+        if ($count > 0) {
+            return $elements[$count - 1];
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/PhysicalDescriptionReader.php b/src/Mods/Reader/PhysicalDescriptionReader.php
new file mode 100644
index 0000000..978526b
--- /dev/null
+++ b/src/Mods/Reader/PhysicalDescriptionReader.php
@@ -0,0 +1,97 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\PhysicalDescription;
+
+/**
+ * Trait for reading PhysicalDescription element
+ */
+trait PhysicalDescriptionReader
+{
+
+    /**
+     * Get the the array of the <physicalDescription> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/physicaldescription.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return PhysicalDescription[]
+     */
+    public function getPhysicalDescriptions(string $query = ''): array
+    {
+        $physicalDescriptions = [];
+        $values = $this->getValues('./mods:physicalDescription' . $query);
+        foreach ($values as $value) {
+            $physicalDescriptions[] = new PhysicalDescription($value);
+        }
+        return $physicalDescriptions;
+    }
+
+    /**
+     * Get the matching <physicalDescription> element.
+     * @see https://www.loc.gov/standards/mods/userguide/physicaldescription.html
+     *
+     * @access public
+     *
+     * @param int $index of the searched element
+     * @param string $query for metadata search
+     *
+     * @return ?PhysicalDescription
+     */
+    public function getPhysicalDescription(int $index, string $query = ''): ?PhysicalDescription
+    {
+        $values = $this->getValues('./mods:physicalDescription' . $query);
+        if (array_key_exists($index, $values)) {
+            return new PhysicalDescription($values[$index]);
+        }
+        return null;
+    }
+
+    /**
+     * Get the the first matching <physicalDescription> element.
+     * @see https://www.loc.gov/standards/mods/userguide/physicaldescription.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?PhysicalDescription
+     */
+    public function getFirstPhysicalDescription(string $query = ''): ?PhysicalDescription
+    {
+        return $this->getPhysicalDescription(0, $query);
+    }
+
+    /**
+     * Get the the last matching <physicalDescription> element.
+     * @see https://www.loc.gov/standards/mods/userguide/physicaldescription.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?PhysicalDescription
+     */
+    public function getLastPhysicalDescription(string $query = ''): ?PhysicalDescription
+    {
+        $elements = $this->getPhysicalDescriptions($query);
+        $count = count($elements);
+        if ($count > 0) {
+            return $elements[$count - 1];
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/RecordInfoReader.php b/src/Mods/Reader/RecordInfoReader.php
new file mode 100644
index 0000000..fca905a
--- /dev/null
+++ b/src/Mods/Reader/RecordInfoReader.php
@@ -0,0 +1,97 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\RecordInfo;
+
+/**
+ * Trait for reading RecordInfo element
+ */
+trait RecordInfoReader
+{
+
+    /**
+     * Get the the array of the <recordInfo> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/recordinfo.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return RecordInfo[]
+     */
+    public function getRecordInfos(string $query = ''): array
+    {
+        $recordInfos = [];
+        $values = $this->getValues('./mods:recordInfo' . $query);
+        foreach ($values as $value) {
+            $recordInfos[] = new RecordInfo($value);
+        }
+        return $recordInfos;
+    }
+
+    /**
+     * Get the matching <recordInfo> element.
+     * @see https://www.loc.gov/standards/mods/userguide/recordinfo.html
+     *
+     * @access public
+     *
+     * @param int $index of the searched element
+     * @param string $query for metadata search
+     *
+     * @return ?RecordInfo
+     */
+    public function getRecordInfo(int $index, string $query = ''): ?RecordInfo
+    {
+        $values = $this->getValues('./mods:recordInfo' . $query);
+        if (array_key_exists($index, $values)) {
+            return new RecordInfo($values[$index]);
+        }
+        return null;
+    }
+
+    /**
+     * Get the the first matching <recordInfo> element.
+     * @see https://www.loc.gov/standards/mods/userguide/recordinfo.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?RecordInfo
+     */
+    public function getFirstRecordInfo(string $query = ''): ?RecordInfo
+    {
+        return $this->getRecordInfo(0, $query);
+    }
+
+    /**
+     * Get the the last matching <recordInfo> element.
+     * @see https://www.loc.gov/standards/mods/userguide/recordinfo.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?RecordInfo
+     */
+    public function getLastRecordInfo(string $query = ''): ?RecordInfo
+    {
+        $elements = $this->getRecordInfos($query);
+        $count = count($elements);
+        if ($count > 0) {
+            return $elements[$count - 1];
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/RelatedItemReader.php b/src/Mods/Reader/RelatedItemReader.php
new file mode 100644
index 0000000..f3ebba3
--- /dev/null
+++ b/src/Mods/Reader/RelatedItemReader.php
@@ -0,0 +1,97 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\RelatedItem;
+
+/**
+ * Trait for reading RelatedItem element
+ */
+trait RelatedItemReader
+{
+
+    /**
+     * Get the the array of the <relatedItem> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/relateditem.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return RelatedItem[]
+     */
+    public function getRelatedItems(string $query = ''): array
+    {
+        $relatedItems = [];
+        $values = $this->getValues('./mods:relatedItem' . $query);
+        foreach ($values as $value) {
+            $relatedItems[] = new RelatedItem($value);
+        }
+        return $relatedItems;
+    }
+
+    /**
+     * Get the matching <relatedItem> element.
+     * @see https://www.loc.gov/standards/mods/userguide/relateditem.html
+     *
+     * @access public
+     *
+     * @param int $index of the searched element
+     * @param string $query for metadata search
+     *
+     * @return ?RelatedItem
+     */
+    public function getRelatedItem(int $index, string $query = ''): ?RelatedItem
+    {
+        $values = $this->getValues('./mods:relatedItem' . $query);
+        if (array_key_exists($index, $values)) {
+            return new RelatedItem($values[$index]);
+        }
+        return null;
+    }
+
+    /**
+     * Get the the first matching <relatedItem> element.
+     * @see https://www.loc.gov/standards/mods/userguide/relateditem.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?RelatedItem
+     */
+    public function getFirstRelatedItem(string $query = ''): ?RelatedItem
+    {
+        return $this->getRelatedItem(0, $query);
+    }
+
+    /**
+     * Get the the last matching <relatedItem> element.
+     * @see https://www.loc.gov/standards/mods/userguide/relateditem.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?RelatedItem
+     */
+    public function getLastRelatedItem(string $query = ''): ?RelatedItem
+    {
+        $elements = $this->getRelatedItems($query);
+        $count = count($elements);
+        if ($count > 0) {
+            return $elements[$count - 1];
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/SubjectReader.php b/src/Mods/Reader/SubjectReader.php
new file mode 100644
index 0000000..1b71164
--- /dev/null
+++ b/src/Mods/Reader/SubjectReader.php
@@ -0,0 +1,97 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\Subject;
+
+/**
+ * Trait for reading Subject element
+ */
+trait SubjectReader
+{
+
+    /**
+     * Get the the array of the <subject> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/subject.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return Subject[]
+     */
+    public function getSubjects(string $query = ''): array
+    {
+        $subjects = [];
+        $values = $this->getValues('./mods:subject' . $query);
+        foreach ($values as $value) {
+            $subjects[] = new Subject($value);
+        }
+        return $subjects;
+    }
+
+    /**
+     * Get the matching <subject> element.
+     * @see https://www.loc.gov/standards/mods/userguide/subject.html
+     *
+     * @access public
+     *
+     * @param int $index of the searched element
+     * @param string $query for metadata search
+     *
+     * @return ?Subject
+     */
+    public function getSubject(int $index, string $query = ''): ?Subject
+    {
+        $values = $this->getValues('./mods:subject' . $query);
+        if (array_key_exists($index, $values)) {
+            return new Subject($values[$index]);
+        }
+        return null;
+    }
+
+    /**
+     * Get the the first matching <subject> element.
+     * @see https://www.loc.gov/standards/mods/userguide/subject.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Subject
+     */
+    public function getFirstSubject(string $query = ''): ?Subject
+    {
+        return $this->getSubject(0, $query);
+    }
+
+    /**
+     * Get the the last matching <subject> element.
+     * @see https://www.loc.gov/standards/mods/userguide/subject.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?Subject
+     */
+    public function getLastSubject(string $query = ''): ?Subject
+    {
+        $elements = $this->getSubjects($query);
+        $count = count($elements);
+        if ($count > 0) {
+            return $elements[$count - 1];
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/TableOfContentsReader.php b/src/Mods/Reader/TableOfContentsReader.php
new file mode 100644
index 0000000..dff031c
--- /dev/null
+++ b/src/Mods/Reader/TableOfContentsReader.php
@@ -0,0 +1,97 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\TableOfContents;
+
+/**
+ * Trait for reading TableOfContents element
+ */
+trait TableOfContentsReader
+{
+
+    /**
+     * Get the the array of the <tableOfContents> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/tableofcontents.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return TableOfContents[]
+     */
+    public function getTablesOfContents(string $query = ''): array
+    {
+        $tableOfContents = [];
+        $values = $this->getValues('./mods:tableOfContents' . $query);
+        foreach ($values as $value) {
+            $tableOfContents[] = new TableOfContents($value);
+        }
+        return $tableOfContents;
+    }
+
+    /**
+     * Get the matching <tableOfContents> element.
+     * @see https://www.loc.gov/standards/mods/userguide/tableofcontents.html
+     *
+     * @access public
+     *
+     * @param int $index of the searched element
+     * @param string $query for metadata search
+     *
+     * @return ?TableOfContents
+     */
+    public function getTableOfContents(int $index, string $query = ''): ?TableOfContents
+    {
+        $values = $this->getValues('./mods:tableOfContents' . $query);
+        if (array_key_exists($index, $values)) {
+            return new TableOfContents($values[$index]);
+        }
+        return null;
+    }
+
+    /**
+     * Get the the first matching <tableOfContents> element.
+     * @see https://www.loc.gov/standards/mods/userguide/tableofcontents.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?TableOfContents
+     */
+    public function getFirstTableOfContents(string $query = ''): ?TableOfContents
+    {
+        return $this->getTableOfContents(0, $query);
+    }
+
+    /**
+     * Get the the last matching <tableOfContents> element.
+     * @see https://www.loc.gov/standards/mods/userguide/tableofcontents.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?TableOfContents
+     */
+    public function getLastTableOfContents(string $query = ''): ?TableOfContents
+    {
+        $elements = $this->getTablesOfContents($query);
+        $count = count($elements);
+        if ($count > 0) {
+            return $elements[$count - 1];
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/TargetAudienceReader.php b/src/Mods/Reader/TargetAudienceReader.php
new file mode 100644
index 0000000..4924bf7
--- /dev/null
+++ b/src/Mods/Reader/TargetAudienceReader.php
@@ -0,0 +1,97 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\TargetAudience;
+
+/**
+ * Trait for reading TargetAudience element
+ */
+trait TargetAudienceReader
+{
+
+    /**
+     * Get the the array of the <targetAudience> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/targetaudience.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return TargetAudience[]
+     */
+    public function getTargetAudiences(string $query = ''): array
+    {
+        $targetAudiences = [];
+        $values = $this->getValues('./mods:targetAudience' . $query);
+        foreach ($values as $value) {
+            $targetAudiences[] = new TargetAudience($value);
+        }
+        return $targetAudiences;
+    }
+
+    /**
+     * Get the matching <targetAudience> element.
+     * @see https://www.loc.gov/standards/mods/userguide/targetaudience.html
+     *
+     * @access public
+     *
+     * @param int $index of the searched element
+     * @param string $query for metadata search
+     *
+     * @return ?TargetAudience
+     */
+    public function getTargetAudience(int $index, string $query = ''): ?TargetAudience
+    {
+        $values = $this->getValues('./mods:targetAudience' . $query);
+        if (array_key_exists($index, $values)) {
+            return new TargetAudience($values[$index]);
+        }
+        return null;
+    }
+
+    /**
+     * Get the the first matching <targetAudience> element.
+     * @see https://www.loc.gov/standards/mods/userguide/targetaudience.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?TargetAudience
+     */
+    public function getFirstTargetAudience(string $query = ''): ?TargetAudience
+    {
+        return $this->getTargetAudience(0, $query);
+    }
+
+    /**
+     * Get the the last matching <targetAudience> element.
+     * @see https://www.loc.gov/standards/mods/userguide/targetaudience.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?TargetAudience
+     */
+    public function getLastTargetAudience(string $query = ''): ?TargetAudience
+    {
+        $elements = $this->getTargetAudiences($query);
+        $count = count($elements);
+        if ($count > 0) {
+            return $elements[$count - 1];
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/TitleInfoReader.php b/src/Mods/Reader/TitleInfoReader.php
new file mode 100644
index 0000000..99221e0
--- /dev/null
+++ b/src/Mods/Reader/TitleInfoReader.php
@@ -0,0 +1,97 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\TitleInfo;
+
+/**
+ * Trait for reading TitleInfo element
+ */
+trait TitleInfoReader
+{
+
+    /**
+     * Get the the array of the <titleInfo> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/titleinfo.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return TitleInfo[]
+     */
+    public function getTitleInfos(string $query = ''): array
+    {
+        $titleInfos = [];
+        $values = $this->getValues('./mods:titleInfo' . $query);
+        foreach ($values as $value) {
+            $titleInfos[] = new TitleInfo($value);
+        }
+        return $titleInfos;
+    }
+
+    /**
+     * Get the matching <titleInfo> element.
+     * @see https://www.loc.gov/standards/mods/userguide/titleinfo.html
+     *
+     * @access public
+     *
+     * @param int $index of the searched element
+     * @param string $query for metadata search
+     *
+     * @return ?TitleInfo
+     */
+    public function getTitleInfo(int $index, string $query = ''): ?TitleInfo
+    {
+        $values = $this->getValues('./mods:titleInfo' . $query);
+        if (array_key_exists($index, $values)) {
+            return new TitleInfo($values[$index]);
+        }
+        return null;
+    }
+
+    /**
+     * Get the the first matching <titleInfo> element.
+     * @see https://www.loc.gov/standards/mods/userguide/titleinfo.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?TitleInfo
+     */
+    public function getFirstTitleInfo(string $query = ''): ?TitleInfo
+    {
+        return $this->getTitleInfo(0, $query);
+    }
+
+    /**
+     * Get the the last matching <titleInfo> element.
+     * @see https://www.loc.gov/standards/mods/userguide/titleinfo.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?TitleInfo
+     */
+    public function getLastTitleInfo(string $query = ''): ?TitleInfo
+    {
+        $elements = $this->getTitleInfos($query);
+        $count = count($elements);
+        if ($count > 0) {
+            return $elements[$count - 1];
+        }
+        return null;
+    }
+}
diff --git a/src/Mods/Reader/TypeOfResourceReader.php b/src/Mods/Reader/TypeOfResourceReader.php
new file mode 100644
index 0000000..0df38df
--- /dev/null
+++ b/src/Mods/Reader/TypeOfResourceReader.php
@@ -0,0 +1,43 @@
+<?php
+
+/**
+ * Copyright (C) 2024 Saxon State and University Library Dresden
+ *
+ * This file is part of the php-mods-reader.
+ *
+ * @license GNU General Public License version 3 or later.
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Slub\Mods\Reader;
+
+use Slub\Mods\Element\TypeOfResource;
+use Slub\Mods\Element\Xml\Element;
+
+/**
+ * Trait for reading TypeOfResource element
+ */
+trait TypeOfResourceReader
+{
+
+    /**
+     * Get the value of the <typeOfResource> element.
+     * @see https://www.loc.gov/standards/mods/userguide/typeofresource.html
+     *
+     * @access public
+     *
+     * @param string $query for metadata search
+     *
+     * @return ?TypeOfResource
+     */
+    public function getTypeOfResource(string $query = ''): ?TypeOfResource
+    {
+        $xpath = './mods:typeOfResource' . $query;
+        $element = new Element($this->xml, $xpath);
+        if ($element->exists()) {
+            return new TypeOfResource($element->getFirstValue());
+        }
+        return null;
+    }
+}