diff --git a/src/Xmlns.php b/src/Xmlns.php
new file mode 100644
index 0000000..fc7f47d
--- /dev/null
+++ b/src/Xmlns.php
@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Soap\Xml;
+
+use VeeWee\Xml\Xmlns\Xmlns as XmlXmlns;
+
+final class Xmlns
+{
+    public static function wsdl(): XmlXmlns
+    {
+        return XmlXmlns::load('http://schemas.xmlsoap.org/wsdl/');
+    }
+
+    public static function soap(): XmlXmlns
+    {
+        return XmlXmlns::load('http://schemas.xmlsoap.org/wsdl/soap/');
+    }
+
+    public static function soap12(): XmlXmlns
+    {
+        return XmlXmlns::load('http://schemas.xmlsoap.org/wsdl/soap12/');
+    }
+
+    public static function xsd(): XmlXmlns
+    {
+        return XmlXmlns::load('http://www.w3.org/2001/XMLSchema');
+    }
+}
diff --git a/src/Xpath/WsdlPreset.php b/src/Xpath/WsdlPreset.php
index ca56817..1cc4d0b 100644
--- a/src/Xpath/WsdlPreset.php
+++ b/src/Xpath/WsdlPreset.php
@@ -5,9 +5,12 @@
 namespace Soap\Xml\Xpath;
 
 use DOMXPath;
+use Soap\Xml\Xmlns;
 use VeeWee\Xml\Dom\Document;
 use VeeWee\Xml\Dom\Xpath\Configurator\Configurator;
-use function VeeWee\Xml\Dom\Locator\root_namespace_uri;
+use function Psl\Dict\filter;
+use function Psl\Dict\merge;
+use function VeeWee\Xml\Dom\Locator\document_element;
 use function VeeWee\Xml\Dom\Xpath\Configurator\namespaces;
 
 final class WsdlPreset implements Configurator
@@ -21,8 +24,18 @@ public function __construct(Document $document)
 
     public function __invoke(DOMXPath $xpath): DOMXPath
     {
-        return namespaces(array_filter([
-            'wsdl' => $this->document->locate(root_namespace_uri()),
-        ]))($xpath);
+        $tns = $this->document->map(document_element())->getAttribute('targetNamespace');
+
+        return namespaces(filter(
+            merge(
+                [
+                    'schema' => Xmlns::xsd()->value(),
+                    'soap' => Xmlns::soap()->value(),
+                    'soap12' => Xmlns::soap12()->value(),
+                    'wsdl' => Xmlns::wsdl()->value(),
+                ],
+                $tns ? ['tns' => $tns] : []
+            )
+        ))($xpath);
     }
 }
diff --git a/tests/Unit/XmlnsTest.php b/tests/Unit/XmlnsTest.php
new file mode 100644
index 0000000..90436d5
--- /dev/null
+++ b/tests/Unit/XmlnsTest.php
@@ -0,0 +1,42 @@
+<?php
+declare(strict_types=1);
+
+namespace SoapTest\Xml\Unit\Xpath;
+
+use PHPUnit\Framework\TestCase;
+use Soap\Xml\Xmlns;
+use VeeWee\Xml\Xmlns\Xmlns as XmlXmlns;
+
+final class XmlnsTest extends TestCase
+{
+    /**
+     * @param callable(): XmlXmlns
+     * @dataProvider provideKnownXmlnses
+     */
+    public function test_it_knows_some_xmlnses(callable $factory, string $uri): void
+    {
+        $xmlns = $factory();
+
+        static::assertSame($xmlns->value(), $uri);
+    }
+
+    public function provideKnownXmlnses()
+    {
+        yield 'wsdl' => [
+            static fn () => Xmlns::wsdl(),
+            'http://schemas.xmlsoap.org/wsdl/'
+        ];
+        yield 'soap' => [
+            static fn () => Xmlns::soap(),
+            'http://schemas.xmlsoap.org/wsdl/soap/'
+        ];
+        yield 'soap12' => [
+            static fn () => Xmlns::soap12(),
+            'http://schemas.xmlsoap.org/wsdl/soap12/'
+        ];
+        yield 'xsd' => [
+            static fn () => Xmlns::xsd(),
+            'http://www.w3.org/2001/XMLSchema'
+        ];
+    }
+}
diff --git a/tests/Unit/Xpath/WsdlPresetTest.php b/tests/Unit/Xpath/WsdlPresetTest.php
index b463a44..e69b3ec 100644
--- a/tests/Unit/Xpath/WsdlPresetTest.php
+++ b/tests/Unit/Xpath/WsdlPresetTest.php
@@ -10,7 +10,7 @@
 
 final class WsdlPresetTest extends TestCase
 {
-    public function test_it_provides_a_wsdl_xpath_preset(): void
+    public function test_it_provides_a_wsdl_prefix_in_xpath_preset(): void
     {
         $doc = Document::fromXmlFile(FIXTURE_DIR.'/weather-ws.wsdl');
         $xpath = $doc->xpath(new WsdlPreset($doc));
@@ -18,4 +18,40 @@ public function test_it_provides_a_wsdl_xpath_preset(): void
         $definitions = $xpath->querySingle('/wsdl:definitions');
         static::assertTrue(is_element($definitions));
     }
+
+    public function test_it_provides_a_soap_prefix_in_xpath_preset(): void
+    {
+        $doc = Document::fromXmlFile(FIXTURE_DIR.'/weather-ws.wsdl');
+        $xpath = $doc->xpath(new WsdlPreset($doc));
+
+        $address = $xpath->querySingle('//soap:address');
+        static::assertTrue(is_element($address));
+    }
+
+    public function test_it_provides_a_soap12_prefix_in_xpath_preset(): void
+    {
+        $doc = Document::fromXmlFile(FIXTURE_DIR.'/weather-ws.wsdl');
+        $xpath = $doc->xpath(new WsdlPreset($doc));
+
+        $address = $xpath->querySingle('//soap12:address');
+        static::assertTrue(is_element($address));
+    }
+
+    public function test_it_provides_a_schema_prefix_in_xpath_preset(): void
+    {
+        $doc = Document::fromXmlFile(FIXTURE_DIR.'/weather-ws.wsdl');
+        $xpath = $doc->xpath(new WsdlPreset($doc));
+
+        $schema = $xpath->querySingle('//schema:schema');
+        static::assertTrue(is_element($schema));
+    }
+
+    public function test_it_provides_a_tns_prefix_in_xpath_preset(): void
+    {
+        $doc = Document::fromXmlFile(FIXTURE_DIR.'/weather-ws.wsdl');
+        $xpath = $doc->xpath(new WsdlPreset($doc));
+
+        $definitions = $xpath->querySingle('//tns:hello');
+        static::assertTrue(is_element($definitions));
+    }
 }
diff --git a/tests/fixtures/weather-ws.wsdl b/tests/fixtures/weather-ws.wsdl
index 8e63500..f1a6f32 100644
--- a/tests/fixtures/weather-ws.wsdl
+++ b/tests/fixtures/weather-ws.wsdl
@@ -349,4 +349,5 @@ Cached version of: http://wsf.cdyne.com/WeatherWS/Weather.asmx?wsdl
             <http:address location="http://wsf.cdyne.com/WeatherWS/Weather.asmx" />
         </wsdl:port>
     </wsdl:service>
+    <tns:hello>test</tns:hello>
 </wsdl:definitions>