diff --git a/examples/OrderBuilderComfortSimple.php b/examples/OrderBuilderComfortSimple.php
index 8c49bae..f76aec8 100644
--- a/examples/OrderBuilderComfortSimple.php
+++ b/examples/OrderBuilderComfortSimple.php
@@ -95,7 +95,7 @@
     ->addDocumentAllowanceCharge(31.00, false, "S", "VAT", 20, null, 10.00, 310.00, null, null, "64", "SPECIAL AGREEMENT")
     ->addDocumentAllowanceCharge(21.00, true, "S", "VAT", 20, null, 10.00, 210.00, null, null, "FC", "FREIGHT SERVICES")
     ->setDocumentSummation(310, 360, 21, 31, 300, 60)
-    ->setDocumentReceivableSpecifiedTradeAccountingAccount("BUYER_ACCOUNT_REF", "BUYER_ACCOUNT_REF_TYPE")
+    ->setDocumentReceivableSpecifiedTradeAccountingAccount("4711", "1")
 
     ->addDocumentTax("S", "VAT", 300.00, 60.00, 20.00, "ExcReason-1", "ExcReasonCode-1", 300.00, 300.00, null)
 
@@ -129,7 +129,7 @@
     ->addDocumentPositionAllowanceCharge(6.00, false, 10.0, 60.0, "64", "SPECIAL AGREEMENT")
     ->addDocumentPositionAllowanceCharge(6.00, true, 10.0, 60.0, "FC", "FREIGHT SERVICES")
     ->setDocumentPositionLineSummation(60.0)
-    ->setDocumentPositionReceivableTradeAccountingAccount("BUYER_ACCOUNTING_REF")
+    ->setDocumentPositionReceivableTradeAccountingAccount("4712")
     ->setDocumentPositionTax("S", "VAT", 19.0, 0.00, "Reason-1", "RC1")
     ->setDocumentPositionUltimateCustomerOrderReferencedDocument("ULTCUSTORDEREF-1", "1", $dt)
 
@@ -160,7 +160,7 @@
     ->addDocumentPositionAllowanceCharge(1.00, false, 1.0, 100.0, "64", "SPECIAL AGREEMENT")
     ->addDocumentPositionAllowanceCharge(1.00, true, 1.0, 100.0, "FC", "FREIGHT SERVICES")
     ->setDocumentPositionLineSummation(100.0)
-    ->setDocumentPositionReceivableTradeAccountingAccount("BUYER_ACCOUNTING_REF")
+    ->setDocumentPositionReceivableTradeAccountingAccount("4713")
     ->setDocumentPositionUltimateCustomerOrderReferencedDocument("ULTCUSTORDEREF-1", "2", $dt)
 
     ->addNewPosition("3")
@@ -190,7 +190,7 @@
     ->addDocumentPositionAllowanceCharge(15.00, false, 10.0, 150.0, "64", "SPECIAL AGREEMENT")
     ->addDocumentPositionAllowanceCharge(15.00, true, 10.0, 150.0, "FC", "FREIGHT SERVICES")
     ->setDocumentPositionLineSummation(150.0)
-    ->setDocumentPositionReceivableTradeAccountingAccount("BUYER_ACCOUNTING_REF")
+    ->setDocumentPositionReceivableTradeAccountingAccount("0816")
     ->setDocumentPositionUltimateCustomerOrderReferencedDocument("ULTCUSTORDEREF-1", "3", $dt)
 
     ->writeFile(getcwd() . "/order-x.xml");
diff --git a/examples/OrderXsdValidation.php b/examples/OrderXsdValidation.php
new file mode 100644
index 0000000..56ea521
--- /dev/null
+++ b/examples/OrderXsdValidation.php
@@ -0,0 +1,29 @@
+<?php
+
+use horstoeko\orderx\OrderXsdValidator;
+use horstoeko\orderx\OrderDocumentReader;
+
+require dirname(__FILE__) . "/../vendor/autoload.php";
+
+function showValidationResult($xsdValidator)
+{
+    if ($xsdValidator->validationFailed()) {
+        echo "\033[01;31mValidation failed\e[0m\n";
+        foreach ($xsdValidator->validationErrors() as $validationError) {
+            echo $validationError . PHP_EOL;
+        }
+    } else {
+        echo "\033[01;32mValidation passed\e[0m\n";
+    }
+}
+
+/**
+ * Valid XML
+ */
+
+$document = OrderDocumentReader::readAndGuessFromFile(dirname(__FILE__) . "/order-x.xml");
+
+$xsdValidator = new OrderXsdValidator($document);
+$xsdValidator->validate();
+
+showValidationResult($xsdValidator);
diff --git a/src/OrderSettings.php b/src/OrderSettings.php
index 8eab18a..22bcb51 100644
--- a/src/OrderSettings.php
+++ b/src/OrderSettings.php
@@ -268,6 +268,16 @@ public static function getValidationDirectory(): string
         return PathUtils::combineAllPaths(static::getSourceDirectory(), "validation");
     }
 
+    /**
+     * Get the directory where all the schema (XSD) files are located
+     *
+     * @return string
+     */
+    public static function getSchemaDirectory(): string
+    {
+        return PathUtils::combineAllPaths(static::getSourceDirectory(), "schema");
+    }
+
     /**
      * Get the full filename of the ICC profile to use
      *
diff --git a/src/OrderXsdValidator.php b/src/OrderXsdValidator.php
new file mode 100644
index 0000000..d20fa81
--- /dev/null
+++ b/src/OrderXsdValidator.php
@@ -0,0 +1,210 @@
+<?php
+
+/**
+ * This file is a part of horstoeko/orderx.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace horstoeko\orderx;
+
+use Exception;
+use DOMDocument;
+use LibXMLError;
+use horstoeko\stringmanagement\PathUtils;
+use horstoeko\orderx\OrderDocument;
+use horstoeko\orderx\OrderSettings;
+
+/**
+ * Class representing the validator against XSD for documents
+ *
+ * @category Order-X
+ * @package  Order-X
+ * @author   D. Erling <horstoeko@erling.com.de>
+ * @license  https://opensource.org/licenses/MIT MIT
+ * @link     https://github.com/horstoeko/orderx
+ */
+class OrderXsdValidator
+{
+    /**
+     * The order document reference
+     *
+     * @var OrderDocument
+     */
+    private $document;
+
+    /**
+     * Internal error bag
+     *
+     * @var array
+     */
+    private $errorBag = [];
+
+    /**
+     * Constructor
+     *
+     * @codeCoverageIgnore
+     * @param OrderDocument $document
+     */
+    public function __construct(OrderDocument $document)
+    {
+        $this->document = $document;
+    }
+
+    /**
+     * Perform validation of document
+     *
+     * @return OrderXsdValidator
+     */
+    public function validate(): OrderXsdValidator
+    {
+        $this->clearErrorBag();
+        $this->initLibXml();
+
+        try {
+            if (!$this->getDocumentContentAsDomDocument()->schemaValidate($this->getDocumentXsdFilename())) {
+                $this->pushLibXmlErrorsToErrorBag();
+            }
+        } catch (Exception $exception) {
+            $this->addToErrorBag($exception);
+        } finally {
+            $this->finalizeLibXml();
+        }
+
+        return $this;
+    }
+
+    /**
+     * Returns true if validation passed otherwise false
+     *
+     * @return boolean
+     */
+    public function validationPased(): bool
+    {
+        return empty($this->errorBag);
+    }
+
+    /**
+     * Returns true if validation failed otherwise false
+     *
+     * @return boolean
+     */
+    public function validationFailed(): bool
+    {
+        return !$this->validationPased();
+    }
+
+    /**
+     * Returns an array of all validation errors
+     *
+     * @return array
+     */
+    public function validationErrors(): array
+    {
+        return $this->errorBag;
+    }
+
+    /**
+     * Initialize LibXML
+     *
+     * @return void
+     */
+    private function initLibXml(): void
+    {
+        libxml_use_internal_errors(true);
+    }
+
+    /**
+     * Finalize LibXML
+     *
+     * @return void
+     */
+    private function finalizeLibXml(): void
+    {
+        libxml_clear_errors();
+        libxml_use_internal_errors(false);
+    }
+
+    /**
+     * Get the content of the document
+     *
+     * @return string
+     */
+    private function getDocumentContent(): string
+    {
+        return $this->document->serializeAsXml();
+    }
+
+    /**
+     * Get the content of the document as a DOMDocument
+     *
+     * @return DOMDocument
+     */
+    private function getDocumentContentAsDomDocument(): DOMDocument
+    {
+        $doc = new DOMDocument();
+        $doc->loadXML($this->getDocumentContent());
+
+        return $doc;
+    }
+
+    /**
+     * Get the XSD file (schema definition) for the document
+     *
+     * @return string
+     */
+    private function getDocumentXsdFilename(): string
+    {
+        $xsdFilename = PathUtils::combineAllPaths(
+            OrderSettings::getSchemaDirectory(),
+            $this->document->getProfileDefinitionParameter('name'),
+            $this->document->getProfileDefinitionParameter('xsdfilename')
+        );
+
+        if (!file_exists($xsdFilename)) {
+            throw new Exception(sprintf("XSD file '%s' not found", $xsdFilename));
+        }
+
+        return $xsdFilename;
+    }
+
+    /**
+     * Clear the internal error bag
+     *
+     * @return void
+     */
+    private function clearErrorBag(): void
+    {
+        $this->errorBag = [];
+    }
+
+    /**
+     * Add message to error bag
+     *
+     * @param string|Exception|LibXMLError $error
+     * @return void
+     */
+    private function addToErrorBag($error): void
+    {
+        if (is_string($error)) {
+            $this->errorBag[] = $error;
+        } elseif ($error instanceof Exception) {
+            $this->errorBag[] = $error->getMessage();
+        } elseif ($error instanceof LibXMLError) {
+            $this->errorBag[] = sprintf('[line %d] %s : %s', $error->line, $error->code, $error->message);
+        }
+    }
+
+    /**
+     * Pushes validation errors to error bag
+     *
+     * @return void
+     */
+    private function pushLibXmlErrorsToErrorBag(): void
+    {
+        foreach (libxml_get_errors() as $xmlError) {
+            $this->addToErrorBag($xmlError);
+        }
+    }
+}