diff --git a/src/BooleanElementTrait.php b/src/BooleanElementTrait.php
new file mode 100644
index 0000000..26ad172
--- /dev/null
+++ b/src/BooleanElementTrait.php
@@ -0,0 +1,70 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMElement;
+use SimpleSAML\Assert\Assert;
+use SimpleSAML\XML\Exception\InvalidDOMElementException;
+use SimpleSAML\XML\Exception\SchemaViolationException;
+
+use sprintf;
+
+/**
+ * Trait grouping common functionality for simple boolean elements
+ *
+ * @package simplesamlphp/xml-common
+ */
+trait BooleanElementTrait
+{
+    use StringElementTrait;
+
+    /**
+     * Validate the content of the element.
+     *
+     * @param string $content  The value to go in the XML textContent
+     * @throws \Exception on failure
+     * @return void
+     */
+    protected function validateContent(string $content): void
+    {
+        Assert::oneOf(
+            $content,
+            ['0', '1', 'false', 'true'],
+            sprintf('The value of %s must be a boolean, "%s" given.', $this->getQualifiedName(), $content),
+            SchemaViolationException::class,
+        );
+    }
+
+
+    /**
+     * Convert XML into a class instance
+     *
+     * @param \DOMElement $xml The XML element we should load
+     * @return static
+     *
+     * @throws \SimpleSAML\XML\Exception\InvalidDOMElementException
+     *   If the qualified name of the supplied element is wrong
+     */
+    public static function fromXML(DOMElement $xml): static
+    {
+        Assert::same($xml->localName, static::getLocalName(), InvalidDOMElementException::class);
+        Assert::same($xml->namespaceURI, static::NS, InvalidDOMElementException::class);
+
+        return new static($xml->textContent);
+    }
+
+
+    /**
+     * @param \DOMElement|null $parent
+     * @return \DOMElement
+     */
+    final public function toXML(DOMElement $parent = null): DOMElement
+    {
+        $e = $this->instantiateParentElement($parent);
+        $e->textContent = $this->getContent();
+
+        return $e;
+    }
+}
diff --git a/src/LocalizedStringElementTrait.php b/src/LocalizedStringElementTrait.php
index 97638e7..6fa8613 100644
--- a/src/LocalizedStringElementTrait.php
+++ b/src/LocalizedStringElementTrait.php
@@ -81,8 +81,6 @@ public static function fromXML(DOMElement $xml): static
             'Missing xml:lang from ' . static::getLocalName(),
             MissingAttributeException::class,
         );
-        Assert::same($xml->localName, static::getLocalName(), InvalidDOMElementException::class);
-        Assert::same($xml->namespaceURI, static::NS, InvalidDOMElementException::class);
 
         return new static($xml->getAttributeNS(C::NS_XML, 'lang'), $xml->textContent);
     }
diff --git a/src/URIElementTrait.php b/src/URIElementTrait.php
new file mode 100644
index 0000000..80ad08a
--- /dev/null
+++ b/src/URIElementTrait.php
@@ -0,0 +1,64 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMElement;
+use SimpleSAML\Assert\Assert;
+use SimpleSAML\XML\Constants as C;
+use SimpleSAML\XML\Exception\InvalidDOMElementException;
+use SimpleSAML\XML\Exception\SchemaViolationException;
+
+/**
+ * Trait grouping common functionality for simple URI string elements
+ *
+ * @package simplesamlphp/xml-common
+ */
+trait URIElementTrait
+{
+    use StringElementTrait;
+
+    /**
+     * Validate the content of the element.
+     *
+     * @param string $content  The value to go in the XML textContent
+     * @throws \Exception on failure
+     * @return void
+     */
+    protected function validateContent(string $content): void
+    {
+        Assert::validURI($content, SchemaViolationException::class);
+    }
+
+
+    /**
+     * Convert XML into a class instance
+     *
+     * @param \DOMElement $xml The XML element we should load
+     * @return static
+     *
+     * @throws \SimpleSAML\XML\Exception\InvalidDOMElementException
+     *   If the qualified name of the supplied element is wrong
+     */
+    public static function fromXML(DOMElement $xml): static
+    {
+        Assert::same($xml->localName, static::getLocalName(), InvalidDOMElementException::class);
+        Assert::same($xml->namespaceURI, static::NS, InvalidDOMElementException::class);
+
+        return new static($xml->textContent);
+    }
+
+
+    /**
+     * @param \DOMElement|null $parent
+     * @return \DOMElement
+     */
+    final public function toXML(DOMElement $parent = null): DOMElement
+    {
+        $e = $this->instantiateParentElement($parent);
+        $e->textContent = $this->getContent();
+
+        return $e;
+    }
+}
diff --git a/tests/Utils/BooleanElement.php b/tests/Utils/BooleanElement.php
new file mode 100644
index 0000000..5f6f7dd
--- /dev/null
+++ b/tests/Utils/BooleanElement.php
@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\Test\XML;
+
+use SimpleSAML\XML\AbstractElement;
+use SimpleSAML\XML\BooleanElementTrait;
+
+/**
+ * Empty shell class for testing BooleanElement.
+ *
+ * @package simplesaml/xml-common
+ */
+final class BooleanElement extends AbstractElement
+{
+    use BooleanElementTrait;
+
+    /** @var string */
+    public const NS = 'urn:x-simplesamlphp:namespace';
+
+    /** @var string */
+    public const NS_PREFIX = 'ssp';
+
+
+    /**
+     * @param string $content
+     */
+    public function __construct(string $content)
+    {
+        $this->setContent($content);
+    }
+}
diff --git a/tests/Utils/URIElement.php b/tests/Utils/URIElement.php
new file mode 100644
index 0000000..d0246a8
--- /dev/null
+++ b/tests/Utils/URIElement.php
@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\Test\XML;
+
+use SimpleSAML\XML\AbstractElement;
+use SimpleSAML\XML\URIElementTrait;
+
+/**
+ * Empty shell class for testing URIElement.
+ *
+ * @package simplesaml/xml-common
+ */
+final class URIElement extends AbstractElement
+{
+    use URIElementTrait;
+
+    /** @var string */
+    public const NS = 'urn:x-simplesamlphp:namespace';
+
+    /** @var string */
+    public const NS_PREFIX = 'ssp';
+
+
+    /**
+     * @param string $content
+     */
+    public function __construct(string $content)
+    {
+        $this->setContent($content);
+    }
+}
diff --git a/tests/XML/BooleanElementTraitTest.php b/tests/XML/BooleanElementTraitTest.php
new file mode 100644
index 0000000..9565787
--- /dev/null
+++ b/tests/XML/BooleanElementTraitTest.php
@@ -0,0 +1,51 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\Test\XML;
+
+use PHPUnit\Framework\TestCase;
+use SimpleSAML\Test\XML\BooleanElement;
+use SimpleSAML\XML\DOMDocumentFactory;
+use SimpleSAML\XML\TestUtils\SerializableElementTestTrait;
+
+use function dirname;
+use function strval;
+
+/**
+ * Class \SimpleSAML\XML\BooleanElementTraitTest
+ *
+ * @covers \SimpleSAML\XML\TestUtils\SerializableElementTestTrait
+ * @covers \SimpleSAML\XML\BooleanElementTrait
+ * @covers \SimpleSAML\XML\AbstractElement
+ *
+ * @package simplesamlphp\xml-common
+ */
+final class BooleanElementTraitTest extends TestCase
+{
+    use SerializableElementTestTrait;
+
+
+    /**
+     */
+    public static function setUpBeforeClass(): void
+    {
+        self::$testedClass = BooleanElement::class;
+
+        self::$xmlRepresentation = DOMDocumentFactory::fromFile(
+            dirname(__FILE__, 2) . '/resources/xml/ssp_BooleanElement.xml',
+        );
+    }
+
+    /**
+     */
+    public function testMarshalling(): void
+    {
+        $booleanElement = new BooleanElement('true');
+
+        $this->assertEquals(
+            self::$xmlRepresentation->saveXML(self::$xmlRepresentation->documentElement),
+            strval($booleanElement),
+        );
+    }
+}
diff --git a/tests/XML/URIElementTraitTest.php b/tests/XML/URIElementTraitTest.php
new file mode 100644
index 0000000..be7f4bb
--- /dev/null
+++ b/tests/XML/URIElementTraitTest.php
@@ -0,0 +1,51 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\Test\XML;
+
+use PHPUnit\Framework\TestCase;
+use SimpleSAML\Test\XML\URIElement;
+use SimpleSAML\XML\DOMDocumentFactory;
+use SimpleSAML\XML\TestUtils\SerializableElementTestTrait;
+
+use function dirname;
+use function strval;
+
+/**
+ * Class \SimpleSAML\XML\URIElementTraitTest
+ *
+ * @covers \SimpleSAML\XML\TestUtils\SerializableElementTestTrait
+ * @covers \SimpleSAML\XML\URIElementTrait
+ * @covers \SimpleSAML\XML\AbstractElement
+ *
+ * @package simplesamlphp\xml-common
+ */
+final class URIElementTraitTest extends TestCase
+{
+    use SerializableElementTestTrait;
+
+
+    /**
+     */
+    public static function setUpBeforeClass(): void
+    {
+        self::$testedClass = URIElement::class;
+
+        self::$xmlRepresentation = DOMDocumentFactory::fromFile(
+            dirname(__FILE__, 2) . '/resources/xml/ssp_URIElement.xml',
+        );
+    }
+
+    /**
+     */
+    public function testMarshalling(): void
+    {
+        $URIElement = new URIElement('https://example.org');
+
+        $this->assertEquals(
+            self::$xmlRepresentation->saveXML(self::$xmlRepresentation->documentElement),
+            strval($URIElement),
+        );
+    }
+}
diff --git a/tests/resources/xml/ssp_BooleanElement.xml b/tests/resources/xml/ssp_BooleanElement.xml
new file mode 100644
index 0000000..bd1facb
--- /dev/null
+++ b/tests/resources/xml/ssp_BooleanElement.xml
@@ -0,0 +1 @@
+<ssp:BooleanElement xmlns:ssp="urn:x-simplesamlphp:namespace">true</ssp:BooleanElement>
diff --git a/tests/resources/xml/ssp_URIElement.xml b/tests/resources/xml/ssp_URIElement.xml
new file mode 100644
index 0000000..ef50d5c
--- /dev/null
+++ b/tests/resources/xml/ssp_URIElement.xml
@@ -0,0 +1 @@
+<ssp:URIElement xmlns:ssp="urn:x-simplesamlphp:namespace">https://example.org</ssp:URIElement>