diff --git a/src/Mods/Element/Part.php b/src/Mods/Element/Part.php
index 65d4382..f88fdd8 100644
--- a/src/Mods/Element/Part.php
+++ b/src/Mods/Element/Part.php
@@ -21,9 +21,11 @@
 use Slub\Mods\Element\Specific\Part\Detail;
 use Slub\Mods\Element\Specific\Part\Extent;
 use Slub\Mods\Element\Specific\Part\Text;
+use Slub\Mods\Element\Xml\Element;
 
 /**
  * Part MODS metadata element class for the 'php-mods-reader' library.
+ * @see https://www.loc.gov/standards/mods/userguide/part.html
  *
  * @access public
  */
@@ -31,30 +33,6 @@ class Part extends BaseElement
 {
     use LanguageAttribute, IdAttribute, AltRepGroupAttribute, DisplayLabelAttribute;
 
-    /**
-     * @access private
-     * @var Detail
-     */
-    private Detail $detail;
-
-    /**
-     * @access private
-     * @var Extent
-     */
-    private Extent $extent;
-
-    /**
-     * @access private
-     * @var DateElement
-     */
-    private DateElement $date;
-
-    /**
-     * @access private
-     * @var Text
-     */
-    private Text $text;
-
     /**
      * This extracts the essential MODS metadata from XML
      *
@@ -70,7 +48,8 @@ public function __construct(\SimpleXMLElement $xml)
     }
 
     /**
-     * Get the value of type
+     * Get the value of the 'type' attribute.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html#type
      *
      * @access public
      *
@@ -82,7 +61,8 @@ public function getType(): string
     }
 
     /**
-     * Get the value of order
+     * Get the value of the 'order' attribute.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html#order
      *
      * @access public
      *
@@ -94,50 +74,86 @@ public function getOrder(): int
     }
 
     /**
-     * Get the value of detail
+     * Get the array of the <detail> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html#detail
      *
      * @access public
      *
-     * @return Detail
+     * @param string $query The XPath query for metadata search
+     *
+     * @return Detail[]
      */
-    public function getDetail(): Detail
+    public function getDetails(string $query = ''): array
     {
-        return $this->detail;
+        $details = [];
+        $xpath = './mods:detail' . $query;
+        $element = new Element($this->xml, $xpath);
+        if ($element->exists()) {
+            foreach ($element->getValues() as $value) {
+                $details[] = new Detail($value);
+            }
+        }
+        return $details;
     }
 
     /**
-     * Get the value of extent
+     * Get the array of the <extent> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html#extent
      *
      * @access public
      *
-     * @return Extent
+     * @param string $query The XPath query for metadata search
+     *
+     * @return Extent[]
      */
-    public function getExtent(): Extent
+    public function getExtents(string $query = ''): array
     {
-        return $this->extent;
+        $extents = [];
+        $xpath = './mods:extent' . $query;
+        $element = new Element($this->xml, $xpath);
+        if ($element->exists()) {
+            foreach ($element->getValues() as $value) {
+                $extents[] = new Extent($value);
+            }
+        }
+        return $extents;
     }
 
     /**
-     * Get the value of date
+     * Get the array of the <date> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html#date
      *
      * @access public
      *
-     * @return DateElement
+     * @param string $query The XPath query for metadata search
+     *
+     * @return DateElement[]
      */
-    public function getDate(): DateElement
+    public function getDates(string $query = ''): array
     {
-        return $this->date;
+        return $this->getDateElements('./mods:date' . $query);
     }
 
     /**
-     * Get the value of text
+     * Get the array of the <text> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html#text
      *
      * @access public
      *
-     * @return Text
+     * @param string $query The XPath query for metadata search
+     *
+     * @return Text[]
      */
-    public function getText(): Text
+    public function getTexts(string $query = ''): array
     {
-        return $this->text;
+        $texts = [];
+        $xpath = './mods:text' . $query;
+        $element = new Element($this->xml, $xpath);
+        if ($element->exists()) {
+            foreach ($element->getValues() as $value) {
+                $texts[] = new Text($value);
+            }
+        }
+        return $texts;
     }
 }
diff --git a/src/Mods/Element/Specific/Part/Detail.php b/src/Mods/Element/Specific/Part/Detail.php
index 60dc489..fcfb2de 100644
--- a/src/Mods/Element/Specific/Part/Detail.php
+++ b/src/Mods/Element/Specific/Part/Detail.php
@@ -17,30 +17,13 @@
 
 /**
  * Detail MODS metadata element class for the 'php-mods-reader' library.
+ * @see https://www.loc.gov/standards/mods/userguide/part.html#detail
  *
  * @access public
  */
 class Detail extends BaseElement
 {
 
-    /**
-     * @access private
-     * @var LanguageElement
-     */
-    private LanguageElement $number;
-
-    /**
-     * @access private
-     * @var LanguageElement
-     */
-    private LanguageElement $caption;
-
-    /**
-     * @access private
-     * @var LanguageElement
-     */
-    private LanguageElement $title;
-
     /**
      * This extracts the essential MODS metadata from XML
      *
@@ -56,7 +39,8 @@ public function __construct(\SimpleXMLElement $xml)
     }
 
     /**
-     * Get the value of type
+     * Get the value of the 'type' attribute.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html#detailtype
      *
      * @access public
      *
@@ -68,7 +52,8 @@ public function getType(): string
     }
 
     /**
-     * Get the value of level
+     * Get the value of the 'level' attribute.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html#level
      *
      * @access public
      *
@@ -80,38 +65,47 @@ public function getLevel(): int
     }
 
     /**
-     * Get the value of number
+     * Get the array of the <number> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html#number
      *
      * @access public
      *
+     * @param string $query The XPath query for metadata search
+     *
      * @return LanguageElement
      */
-    public function getNumber(): LanguageElement
+    public function getNumbers(string $query = ''): array
     {
-        return $this->number;
+        return $this->getLanguageElements('./mods:number' . $query);
     }
 
     /**
-     * Get the value of caption
+     * Get the array of the <caption> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html#caption
      *
      * @access public
      *
+     * @param string $query The XPath query for metadata search
+     *
      * @return LanguageElement
      */
-    public function getCaption(): LanguageElement
+    public function getCaptions(string $query = ''): array
     {
-        return $this->caption;
+        return $this->getLanguageElements('./mods:caption' . $query);
     }
 
     /**
-     * Get the value of title
+     * Get the array of the <title> elements.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html#title
      *
      * @access public
      *
+     * @param string $query The XPath query for metadata search
+     *
      * @return LanguageElement
      */
-    public function getTitle(): LanguageElement
+    public function getTitles(string $query = ''): array
     {
-        return $this->title;
+        return $this->getLanguageElements('./mods:title' . $query);
     }
 }
diff --git a/src/Mods/Element/Specific/Part/Extent.php b/src/Mods/Element/Specific/Part/Extent.php
index 1be1e2c..c95550d 100644
--- a/src/Mods/Element/Specific/Part/Extent.php
+++ b/src/Mods/Element/Specific/Part/Extent.php
@@ -14,39 +14,17 @@
 
 use Slub\Mods\Element\Common\BaseElement;
 use Slub\Mods\Element\Common\LanguageElement;
+use Slub\Mods\Element\Xml\Element;
 
 /**
  * Extent MODS metadata element class for the 'php-mods-reader' library.
+ * @see https://www.loc.gov/standards/mods/userguide/part.html#extent
  *
  * @access public
  */
 class Extent extends BaseElement
 {
 
-    /**
-     * @access private
-     * @var LanguageElement
-     */
-    private LanguageElement $start;
-
-    /**
-     * @access private
-     * @var LanguageElement
-     */
-    private LanguageElement $end;
-
-    /**
-     * @access private
-     * @var int
-     */
-    private int $total;
-
-    /**
-     * @access private
-     * @var LanguageElement
-     */
-    private LanguageElement $list;
-
     /**
      * This extracts the essential MODS metadata from XML
      *
@@ -62,7 +40,8 @@ public function __construct(\SimpleXMLElement $xml)
     }
 
     /**
-     * Get the value of unit
+     * Get the value of the 'unit' attribute.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html#unit
      *
      * @access public
      *
@@ -74,50 +53,67 @@ public function getUnit(): string
     }
 
     /**
-     * Get the value of start
+     * Get the value of the <start> element.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html#start
      *
      * @access public
      *
+     * @param string $query The XPath query for metadata search
+     *
      * @return LanguageElement
      */
-    public function getStart(): LanguageElement
+    public function getStart(string $query = ''): LanguageElement
     {
-        return $this->start;
+        return $this->getLanguageElement('./mods:start' . $query);
     }
 
     /**
-     * Get the value of end
+     * Get the value of the <end> element.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html#end
      *
      * @access public
      *
+     * @param string $query The XPath query for metadata search
+     *
      * @return LanguageElement
      */
-    public function getEnd(): LanguageElement
+    public function getEnd(string $query = ''): LanguageElement
     {
-        return $this->end;
+        return $this->getLanguageElement('./mods:end' . $query);
     }
 
     /**
-     * Get the value of total
+     * Get the value of the <total> element.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html#total
      *
      * @access public
      *
-     * @return int
+     * @param string $query The XPath query for metadata search
+     *
+     * @return int value or 0 when no value found
      */
-    public function getTotal(): int
+    public function getTotal(string $query = ''): int
     {
-        return $this->total;
+        $xpath = './mods:total' . $query;
+        $element = new Element($this->xml, $xpath);
+        if ($element->exists()) {
+            return (int) $element->getValues()[0];
+        }
+        return 0;
     }
 
     /**
-     * Get the value of list
+     * Get the value of the <list> element.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html#list
      *
      * @access public
      *
+     * @param string $query The XPath query for metadata search
+     *
      * @return LanguageElement
      */
-    public function getList(): LanguageElement
+    public function getList(string $query = ''): LanguageElement
     {
-        return $this->list;
+        return $this->getLanguageElement('./mods:list' . $query);
     }
 }
diff --git a/src/Mods/Element/Specific/Part/Text.php b/src/Mods/Element/Specific/Part/Text.php
index d7340c2..6902017 100644
--- a/src/Mods/Element/Specific/Part/Text.php
+++ b/src/Mods/Element/Specific/Part/Text.php
@@ -18,6 +18,7 @@
 
 /**
  * Text MODS metadata element class for the 'php-mods-reader' library.
+ * @see https://www.loc.gov/standards/mods/userguide/part.html#text
  *
  * @access public
  */
@@ -39,9 +40,9 @@ public function __construct(\SimpleXMLElement $xml)
         parent::__construct($xml);
     }
 
-
     /**
-     * Get the value of type
+     * Get the value of the 'type' attribute.
+     * @see https://www.loc.gov/standards/mods/userguide/part.html#texttype
      *
      * @access public
      *
@@ -49,11 +50,6 @@ public function __construct(\SimpleXMLElement $xml)
      */
     public function getType(): string
     {
-        $value = $this->xml->attributes()->type;
-
-        if (!empty($value)) {
-            return $value;
-        }
-        return '';
+        return $this->getStringAttribute('type');
     }
 }