diff --git a/src/Mods/Attribute/Common/DateAttribute.php b/src/Mods/Attribute/Common/DateAttribute.php
index a3a090b..3c3ae3b 100644
--- a/src/Mods/Attribute/Common/DateAttribute.php
+++ b/src/Mods/Attribute/Common/DateAttribute.php
@@ -12,6 +12,8 @@
 
 namespace Slub\Mods\Attribute\Common;
 
+use Slub\Mods\Exception\IncorrectValueInAttributeException;
+
 trait DateAttribute
 {
 
@@ -47,31 +49,50 @@ trait DateAttribute
     ];
 
     /**
-     * Get the value of encoding
+     * Get the value of the 'encoding' attribute.
+     * @see https://www.loc.gov/standards/mods/userguide/attributes.html#encoding
      *
      * @access public
      *
      * @return string
+     *
+     * @throws IncorrectValueInAttributeException
      */
     public function getEncoding(): string
     {
-        return $this->getStringAttribute('encoding');
+        $encoding = $this->getStringAttribute('encoding');
+
+        if (empty($encoding) && in_array($encoding, $this->allowedEncodings)) {
+            return $encoding;
+        }
+
+        throw new IncorrectValueInAttributeException('encoding', $encoding);
     }
 
     /**
-     * Get the value of point
+     * Get the value of the 'point' attribute.
+     * @see https://www.loc.gov/standards/mods/userguide/attributes.html#point
      *
      * @access public
      *
      * @return string
+     *
+     * @throws IncorrectValueInAttributeException
      */
     public function getPoint(): string
     {
-        return $this->getStringAttribute('point');
+        $point = $this->getStringAttribute('point');
+
+        if (empty($point) && in_array($point, $this->allowedPoints)) {
+            return $point;
+        }
+
+        throw new IncorrectValueInAttributeException('point', $point);
     }
 
     /**
-     * Get the value of keyDate
+     * Get the value of the 'keyDate' attribute.
+     * @see https://www.loc.gov/standards/mods/userguide/attributes.html#keyDate
      *
      * @access public
      *
@@ -83,19 +104,29 @@ public function isKeyDate(): bool
     }
 
     /**
-     * Get the value of qualifier
+     * Get the value of the 'qualifier' attribute.
+     * @see https://www.loc.gov/standards/mods/userguide/attributes.html#qualifier
      *
      * @access public
      *
      * @return string
+     * 
+     * @throws IncorrectValueInAttributeException
      */
     public function getQualifier(): string
     {
-        return $this->getStringAttribute('qualifier');
+        $qualifier = $this->getStringAttribute('qualifier');
+
+        if (empty($qualifier) && in_array($qualifier, $this->allowedQualifiers)) {
+            return $qualifier;
+        }
+
+        throw new IncorrectValueInAttributeException('qualifier', $qualifier);
     }
 
     /**
-     * Get the value of calendar
+     * Get the value of the 'calendar' attribute.
+     * @see https://www.loc.gov/standards/mods/userguide/attributes.html#calendar
      *
      * @access public
      *
diff --git a/src/Mods/Attribute/Common/Miscellaneous/UsageAttribute.php b/src/Mods/Attribute/Common/Miscellaneous/UsageAttribute.php
index 5a67daf..41da487 100644
--- a/src/Mods/Attribute/Common/Miscellaneous/UsageAttribute.php
+++ b/src/Mods/Attribute/Common/Miscellaneous/UsageAttribute.php
@@ -12,6 +12,8 @@
 
 namespace Slub\Mods\Attribute\Common\Miscellaneous;
 
+use Slub\Mods\Exception\IncorrectValueInAttributeException;
+
 /**
  * Trait for usage common attribute
  */
@@ -28,14 +30,23 @@ trait UsageAttribute
     ];
 
     /**
-     * Get the value of usage
+     * Get the value of the 'usage' attribute.
+     * @see https://www.loc.gov/standards/mods/userguide/attributes.html#usage
      *
      * @access public
      *
      * @return string
+     *
+     * @throws IncorrectValueInAttributeException
      */
     public function getUsage(): string
     {
-        return $this->getStringAttribute('usage');
+        $usage = $this->getStringAttribute('usage');
+
+        if (empty($usage) && in_array($usage, $this->allowedUsages)) {
+            return $usage;
+        }
+
+        throw new IncorrectValueInAttributeException('usage', $usage);
     }
 }
diff --git a/src/Mods/Attribute/Specific/TypeAttribute.php b/src/Mods/Attribute/Specific/TypeAttribute.php
index 85c097f..fa4da23 100644
--- a/src/Mods/Attribute/Specific/TypeAttribute.php
+++ b/src/Mods/Attribute/Specific/TypeAttribute.php
@@ -12,6 +12,8 @@
 
 namespace Slub\Mods\Attribute\Specific;
 
+use Slub\Mods\Exception\IncorrectValueInAttributeException;
+
 /**
  * Trait for type specific attribute
  */
@@ -28,14 +30,22 @@ trait TypeAttribute
     ];
 
     /**
-     * Get the value of type
+     * Get the value of the 'type' attribute.
      *
      * @access public
      *
      * @return string
+     *
+     * @throws IncorrectValueInAttributeException
      */
     public function getType(): string
     {
-        return $this->getStringAttribute('type');
+        $type = $this->getStringAttribute('type');
+
+        if (empty($type) && in_array($type, $this->allowedTypes)) {
+            return $type;
+        }
+
+        throw new IncorrectValueInAttributeException('type', $type);
     }
 }
diff --git a/src/Mods/Element/RelatedItem.php b/src/Mods/Element/RelatedItem.php
index 027d8ff..c67fdda 100644
--- a/src/Mods/Element/RelatedItem.php
+++ b/src/Mods/Element/RelatedItem.php
@@ -17,6 +17,7 @@
 use Slub\Mods\Attribute\Common\Miscellaneous\DisplayLabelAttribute;
 use Slub\Mods\Attribute\Specific\OtherTypeAttribute;
 use Slub\Mods\Element\Common\BaseElement;
+use Slub\Mods\Exception\IncorrectValueInAttributeException;
 
 /**
  * RelatedItem MODS metadata element class for the 'php-mods-reader' library.
@@ -62,14 +63,23 @@ 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/relateditem.html#type
      *
      * @access public
      *
      * @return string
+     *
+     * @throws IncorrectValueInAttributeException
      */
     public function getType(): string
     {
-        return $this->getStringAttribute('type');
+        $type = $this->getStringAttribute('type');
+
+        if (empty($type) && in_array($type, $this->allowedTypes)) {
+            return $type;
+        }
+
+        throw new IncorrectValueInAttributeException('type', $type);
     }
 }
diff --git a/src/Mods/Element/Specific/Location/Url.php b/src/Mods/Element/Specific/Location/Url.php
index 4a891f5..47a248f 100644
--- a/src/Mods/Element/Specific/Location/Url.php
+++ b/src/Mods/Element/Specific/Location/Url.php
@@ -15,6 +15,7 @@
 use Slub\Mods\Attribute\Common\Miscellaneous\DisplayLabelAttribute;
 use Slub\Mods\Attribute\Common\Miscellaneous\UsageAttribute;
 use Slub\Mods\Element\Common\BaseElement;
+use Slub\Mods\Exception\IncorrectValueInAttributeException;
 
 /**
  * Url MODS metadata element class for the 'php-mods-reader' library.
@@ -50,19 +51,28 @@ public function __construct(\SimpleXMLElement $xml)
     }
 
     /**
-     * Get the value of dateLastAccessed
+     * Get the value of the 'dateLastAccessed' attribute.
+     * @see https://www.loc.gov/standards/mods/userguide/location.html#datelastaccessed
      *
      * @access public
      *
      * @return string
+     *
+     * @throws IncorrectValueInAttributeException
      */
     public function getDateLastAccessed(): string
     {
-        return $this->getStringAttribute('dateLastAccessed');
+        $dateLastAccessed = $this->getStringAttribute('dateLastAccessed');
+
+        if (empty($dateLastAccessed) && in_array($dateLastAccessed, $this->allowedAccess)) {
+            return $dateLastAccessed;
+        }
+
+        throw new IncorrectValueInAttributeException('dateLastAccessed', $dateLastAccessed);
     }
 
     /**
-     * Get the value of note
+     * Get the value of the 'note' attribute.
      *
      * @access public
      *
@@ -74,7 +84,7 @@ public function getNote(): string
     }
 
     /**
-     * Get the value of access
+     * Get the value of the 'access' attribute.
      *
      * @access public
      *
diff --git a/src/Mods/Element/Specific/Name/AlternativeName.php b/src/Mods/Element/Specific/Name/AlternativeName.php
index 400deb5..3f993da 100644
--- a/src/Mods/Element/Specific/Name/AlternativeName.php
+++ b/src/Mods/Element/Specific/Name/AlternativeName.php
@@ -16,6 +16,7 @@
 use Slub\Mods\Attribute\Common\Linking\IdAttribute;
 use Slub\Mods\Attribute\Common\Linking\XlinkHrefAttribute;
 use Slub\Mods\Attribute\Common\Miscellaneous\DisplayLabelAttribute;
+use Slub\Mods\Exception\IncorrectValueInAttributeException;
 
 /**
  * AlternativeName MODS metadata element class for the 'php-mods-reader' library.
@@ -60,9 +61,17 @@ public function __construct(\SimpleXMLElement $xml)
      * @access public
      *
      * @return string
+     *
+     * @throws IncorrectValueInAttributeException
      */
     public function getAlternativeType(): string
     {
-        return $this->getStringAttribute('altType');
+        $altType = $this->getStringAttribute('altType');
+
+        if (empty($altType) && in_array($altType, $this->allowedAlternativeTypes)) {
+            return $altType;
+        }
+
+        throw new IncorrectValueInAttributeException('altType', $altType);
     }
 }
diff --git a/src/Mods/Element/Specific/Name/NamePart.php b/src/Mods/Element/Specific/Name/NamePart.php
index a5edb1a..3be97ad 100644
--- a/src/Mods/Element/Specific/Name/NamePart.php
+++ b/src/Mods/Element/Specific/Name/NamePart.php
@@ -16,6 +16,7 @@
 use Slub\Mods\Attribute\Common\Linking\AltRepGroupAttribute;
 use Slub\Mods\Attribute\Common\Miscellaneous\DisplayLabelAttribute;
 use Slub\Mods\Element\Common\BaseElement;
+use Slub\Mods\Exception\IncorrectValueInAttributeException;
 
 /**
  * NamePart MODS metadata element class for the 'php-mods-reader' library.
@@ -53,15 +54,23 @@ public function __construct(\SimpleXMLElement $xml)
     }
 
     /**
-     * Get the value of the 'tpe' attribute.
+     * Get the value of the 'type' attribute.
      * @see https://www.loc.gov/standards/mods/userguide/name.html#nameParttype
      *
      * @access public
      *
      * @return string
+     *
+     * @throws IncorrectValueInAttributeException
      */
     public function getType(): string
     {
-        return $this->getStringAttribute('type');
+        $type = $this->getStringAttribute('type');
+
+        if (empty($type) && in_array($type, $this->allowedTypes)) {
+            return $type;
+        }
+
+        throw new IncorrectValueInAttributeException('type', $type);
     }
 }
diff --git a/src/Mods/Element/Specific/OriginInfo/Agent.php b/src/Mods/Element/Specific/OriginInfo/Agent.php
index a1e2058..740dc95 100644
--- a/src/Mods/Element/Specific/OriginInfo/Agent.php
+++ b/src/Mods/Element/Specific/OriginInfo/Agent.php
@@ -27,9 +27,11 @@
 use Slub\Mods\Element\Specific\Name\NameIdentifier;
 use Slub\Mods\Element\Specific\Name\NamePart;
 use Slub\Mods\Element\Specific\Name\Role;
+use Slub\Mods\Exception\IncorrectValueInAttributeException;
 
 /**
  * Agent MODS metadata element class for the 'php-mods-reader' library.
+ * @see https://www.loc.gov/standards/mods/userguide/origininfo.html#agent
  *
  * @access public
  */
@@ -120,15 +122,24 @@ 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/name.html#type
      *
      * @access public
      *
      * @return string
+     * 
+     * @throws IncorrectValueInAttributeException
      */
     public function getType(): string
     {
-        return $this->getStringAttribute('type');
+        $type = $this->getStringAttribute('type');
+
+        if (empty($type) && in_array($type, $this->allowedTypes)) {
+            return $type;
+        }
+
+        throw new IncorrectValueInAttributeException('type', $type);
     }
 
     /**
diff --git a/src/Mods/Element/Specific/TitleInfo/NonSort.php b/src/Mods/Element/Specific/TitleInfo/NonSort.php
index bf6af03..872738d 100644
--- a/src/Mods/Element/Specific/TitleInfo/NonSort.php
+++ b/src/Mods/Element/Specific/TitleInfo/NonSort.php
@@ -14,6 +14,7 @@
 
 use Slub\Mods\Attribute\Common\LanguageAttribute;
 use Slub\Mods\Element\Common\BaseElement;
+use Slub\Mods\Exception\IncorrectValueInAttributeException;
 
 /**
  * NonSort MODS metadata element class for the 'php-mods-reader' library.
@@ -49,14 +50,23 @@ public function __construct(\SimpleXMLElement $xml)
     }
 
     /**
-     * Get the value of xmlSpace
+     * Get the value of the 'xmlSpace' attribute.
+     * @see https://www.loc.gov/standards/mods/userguide/attributes.html#xmlspace
      *
      * @access public
      *
      * @return string
+     *
+     * @throws IncorrectValueInAttributeException
      */
     public function getXmlSpace(): string
     {
-        return $this->getStringAttribute('xmlSpace');
+        $xmlSpace = $this->getStringAttribute('xml:space');
+
+        if (empty($xmlSpace) && in_array($xmlSpace, $this->allowedXmlSpaces)) {
+            return $xmlSpace;
+        }
+
+        throw new IncorrectValueInAttributeException('xml:space', $xmlSpace);
     }
 }
diff --git a/src/Mods/Element/TitleInfo.php b/src/Mods/Element/TitleInfo.php
index d5d57fe..102d153 100644
--- a/src/Mods/Element/TitleInfo.php
+++ b/src/Mods/Element/TitleInfo.php
@@ -28,6 +28,7 @@
 use Slub\Mods\Element\Common\LanguageElement;
 use Slub\Mods\Element\Specific\TitleInfo\NonSort;
 use Slub\Mods\Element\Xml\Element;
+use Slub\Mods\Exception\IncorrectValueInAttributeException;
 
 /**
  * TitleInfo MODS metadata element class for the 'php-mods-reader' library.
@@ -71,10 +72,18 @@ public function __construct(\SimpleXMLElement $xml)
      * @access public
      *
      * @return string
+     *
+     * @throws IncorrectValueInAttributeException
      */
     public function getType(): string
     {
-        return $this->getStringAttribute('type');
+        $type = $this->getStringAttribute('type');
+
+        if (empty($type) && in_array($type, $this->allowedTypes)) {
+            return $type;
+        }
+
+        throw new IncorrectValueInAttributeException('type', $type);
     }
 
     /**