diff --git a/src/EnvReader/XmlConfig.php b/src/EnvReader/XmlConfig.php
index 4166d46..23b9165 100644
--- a/src/EnvReader/XmlConfig.php
+++ b/src/EnvReader/XmlConfig.php
@@ -3,9 +3,11 @@
 namespace jrosset\EnvReader;
 
 use Exception;
-use jrosset\ArrayClasses\InsensitiveCaseArrayClass;
-use SimpleXMLElement;
+use jrosset\EnvReader\XmlStructure\IXmlStructure;
 
+/**
+ * A XML file configuration class
+ */
 abstract class XmlConfig extends GenericConfig implements IExternalConfigFile {
     use TMultiLevelProperties;
 
@@ -13,11 +15,13 @@ abstract class XmlConfig extends GenericConfig implements IExternalConfigFile {
      * @inheritDoc
      */
     protected function readConfig (): void {
+        //region Contrôle fichier existant
         $configFile = $this->getConfigFilePath();
         if (!file_exists($configFile)) {
             throw new Exception('Unable to find configuration file "' . $configFile . '"');
         }
-
+        //endregion
+        //region Chargement fichier et traitement erreurs
         if (($xml = simplexml_load_file($configFile)) === false) {
             $errors = [];
             foreach (libxml_get_errors() as $error) {
@@ -41,15 +45,16 @@ abstract class XmlConfig extends GenericConfig implements IExternalConfigFile {
 
             throw new Exception('Unable to read configuration file "' . $configFile . '": ' . PHP_EOL . implode(PHP_EOL, $errors));
         }
-        $this->properties = $this->parseXml($xml);
+        //endregion
+
+        //region Parsage XML
+        $this->properties = $this->getConfigStructure()->parseXml($xml);
+        //endregion
     }
     /**
-     * Parse an XML node to properties
-     *
-     * @param SimpleXMLElement          $xmlNode    The INI level
-     * @param InsensitiveCaseArrayClass $properties [OUT] The out properties list
+     * Obtient la structure de la configuration
      *
-     * @return void
+     * @return IXmlStructure La structure de la configuration
      */
-    protected abstract function parseXml (SimpleXMLElement $xmlNode): InsensitiveCaseArrayClass;
+    protected abstract function getConfigStructure (): IXmlStructure;
 }
\ No newline at end of file
diff --git a/src/EnvReader/XmlStructure/AttributeListXmlStructure.php b/src/EnvReader/XmlStructure/AttributeListXmlStructure.php
new file mode 100644
index 0000000..ec4f0c3
--- /dev/null
+++ b/src/EnvReader/XmlStructure/AttributeListXmlStructure.php
@@ -0,0 +1,75 @@
+<?php
+
+namespace jrosset\EnvReader\XmlStructure;
+
+use jrosset\ArrayClasses\InsensitiveCaseArrayClass;
+use SimpleXMLElement;
+
+/**
+ * Structure about XML attributes
+ */
+class AttributeListXmlStructure implements IXmlStructure {
+    /**
+     * @var array Allowed attributes. Empty for all
+     */
+    private array $allowed;
+    /**
+     * @var InsensitiveCaseArrayClass Mapping between attributes name and properties name
+     */
+    private InsensitiveCaseArrayClass $mapping;
+
+    /**
+     * Initialize
+     */
+    public function __construct () {
+        $this->allowed = [];
+        $this->mapping = new InsensitiveCaseArrayClass();
+    }
+
+    /**
+     * Add a new allowed attribute name
+     *
+     * @param string      $attributeName The new allowed attribute name
+     * @param string|null $propertyName  The corresponding property name. Null if identical to attribute name
+     *
+     * @return $this
+     */
+    public function addAllowed (string $attributeName, ?string $propertyName = null): self {
+        $this->allowed[] = mb_strtolower($attributeName);
+        if ($propertyName !== null) {
+            $this->addMapping($attributeName, $propertyName);
+        }
+        return $this;
+    }
+    /**
+     * Add a new mapping
+     *
+     * @param string $attributeName The new attribute name
+     * @param string $propertyName  The corresponding property name
+     *
+     * @return $this
+     */
+    public function addMapping (string $attributeName, string $propertyName): self {
+        $this->mapping->set($attributeName, $propertyName);
+        return $this;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function parseXml (SimpleXMLElement $xmlNode): InsensitiveCaseArrayClass {
+        $properties = new InsensitiveCaseArrayClass();
+        if (($attributes = $xmlNode->attributes()) === null) {
+            return $properties;
+        }
+
+        $allowAll = count($this->allowed) === 0;
+        foreach ($attributes as $attributeName => $attributeValue) {
+            if (!$allowAll && !in_array(mb_strtolower($attributeName), $this->allowed)) {
+                continue;
+            }
+            $properties->set($this->mapping->get($attributeName, false) ?? $attributeName, (string)$attributeValue);
+        }
+        return $properties;
+    }
+}
\ No newline at end of file
diff --git a/src/EnvReader/XmlStructure/AttributeSingleXmlStructure.php b/src/EnvReader/XmlStructure/AttributeSingleXmlStructure.php
new file mode 100644
index 0000000..4050289
--- /dev/null
+++ b/src/EnvReader/XmlStructure/AttributeSingleXmlStructure.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace jrosset\EnvReader\XmlStructure;
+
+use SimpleXMLElement;
+
+/**
+ * Structure about a single attribute
+ */
+class AttributeSingleXmlStructure implements IXmlStructure {
+    /**
+     * @var string The attribute name
+     */
+    private string $attributeName;
+
+    /**
+     * Initialize
+     *
+     * @param string $attributeName The attribute name
+     */
+    public function __construct (string $attributeName) {
+        $this->attributeName = $attributeName;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function parseXml (SimpleXMLElement $xmlNode): string {
+        return (string)$xmlNode[$this->attributeName];
+    }
+}
\ No newline at end of file
diff --git a/src/EnvReader/XmlStructure/ChildrenXmlStructure.php b/src/EnvReader/XmlStructure/ChildrenXmlStructure.php
new file mode 100644
index 0000000..b081d53
--- /dev/null
+++ b/src/EnvReader/XmlStructure/ChildrenXmlStructure.php
@@ -0,0 +1,87 @@
+<?php
+
+namespace jrosset\EnvReader\XmlStructure;
+
+use jrosset\ArrayClasses\ArrayClass;
+use jrosset\ArrayClasses\InsensitiveCaseArrayClass;
+use SimpleXMLElement;
+
+/**
+ * Structure about children nodes
+ */
+class ChildrenXmlStructure implements IXmlStructure {
+    /**
+     * @var AttributeListXmlStructure|null The attribute structure. Null if none
+     */
+    private ?AttributeListXmlStructure $attributesStructure;
+    /**
+     * @var ArrayClass The children nodes
+     */
+    private ArrayClass $childrenNodes;
+    /**
+     * @var InsensitiveCaseArrayClass Mapping between child node name and properties name
+     */
+    private ArrayClass $mapping;
+
+    /**
+     * Initialize
+     */
+    public function __construct () {
+        $this->attributesStructure = null;
+        $this->childrenNodes = new ArrayClass();
+        $this->mapping = new ArrayClass();
+    }
+
+    /**
+     * Set the attribute structure
+     *
+     * @param AttributeListXmlStructure|null $attributesStructure The new attribute structure. Null if none
+     *
+     * @return $this
+     */
+    public function setAttributesStructure (?AttributeListXmlStructure $attributesStructure = null): self {
+        $this->attributesStructure = $attributesStructure;
+        return $this;
+    }
+    /**
+     * Add a child node
+     *
+     * @param string        $childNodeName      The child node's name
+     * @param IXmlStructure $childNodeStructure The child node's structure
+     * @param string|null   $propertyName       The corresponding property name. Null if identical to child node's name
+     *
+     * @return $this
+     */
+    public function addChildNode (string $childNodeName, IXmlStructure $childNodeStructure, ?string $propertyName = null): self {
+        $this->childrenNodes->set($childNodeName, $childNodeStructure);
+        if ($propertyName !== null) {
+            $this->mapping->set($childNodeName, $propertyName);
+        }
+        return $this;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function parseXml (SimpleXMLElement $xmlNode): InsensitiveCaseArrayClass {
+        if ($this->attributesStructure === null) {
+            $properties = new InsensitiveCaseArrayClass();
+        }
+        else {
+            $properties = $this->attributesStructure->parseXml($xmlNode);
+        }
+
+        /** @var IXmlStructure $childNodeStructure */
+        foreach ($this->childrenNodes as $childNodeName => $childNodeStructure) {
+            if (!isset($xmlNode->$childNodeName)) {
+                continue;
+            }
+            $properties->set(
+                $this->mapping->get($childNodeName, false) ?? $childNodeName,
+                $childNodeStructure->parseXml($xmlNode->$childNodeName)
+            );
+        }
+
+        return $properties;
+    }
+}
\ No newline at end of file
diff --git a/src/EnvReader/XmlStructure/IXmlStructure.php b/src/EnvReader/XmlStructure/IXmlStructure.php
new file mode 100644
index 0000000..776db9d
--- /dev/null
+++ b/src/EnvReader/XmlStructure/IXmlStructure.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace jrosset\EnvReader\XmlStructure;
+
+use SimpleXMLElement;
+
+/**
+ * The interface of XML structure
+ */
+interface IXmlStructure {
+    /**
+     * Parse a XML node
+     *
+     * @param SimpleXMLElement $xmlNode The XML node
+     *
+     * @return mixed The extracted value
+     */
+    public function parseXml (SimpleXMLElement $xmlNode);
+}
\ No newline at end of file
diff --git a/src/EnvReader/XmlStructure/ListXmlStructure.php b/src/EnvReader/XmlStructure/ListXmlStructure.php
new file mode 100644
index 0000000..61d1d70
--- /dev/null
+++ b/src/EnvReader/XmlStructure/ListXmlStructure.php
@@ -0,0 +1,47 @@
+<?php
+
+namespace jrosset\EnvReader\XmlStructure;
+
+use jrosset\ArrayClasses\InsensitiveCaseArrayClass;
+use SimpleXMLElement;
+
+/**
+ * Structure about children list
+ */
+class ListXmlStructure implements IXmlStructure {
+    /**
+     * @var string The child node's name
+     */
+    private string $childNodeName;
+    /**
+     * @var IXmlStructure The child node's structure
+     */
+    private IXmlStructure $childNodeStructure;
+
+    /**
+     * Initialize
+     *
+     * @param string        $childNodeName      The child node's name
+     * @param IXmlStructure $childNodeStructure The child node's structure
+     */
+    public function __construct (string $childNodeName, IXmlStructure $childNodeStructure) {
+        $this->childNodeName = $childNodeName;
+        $this->childNodeStructure = $childNodeStructure;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function parseXml (SimpleXMLElement $xmlNode): InsensitiveCaseArrayClass {
+        $properties = new InsensitiveCaseArrayClass();
+        if (!isset($xmlNode->{$this->childNodeName})) {
+            return $properties;
+        }
+
+        foreach ($xmlNode->{$this->childNodeName} as $childNode) {
+            $childProperties = $this->childNodeStructure->parseXml($childNode);
+            $properties->push($childProperties);
+        }
+        return $properties;
+    }
+}
\ No newline at end of file
diff --git a/src/EnvReader/XmlStructure/TextXmlStructure.php b/src/EnvReader/XmlStructure/TextXmlStructure.php
new file mode 100644
index 0000000..73760da
--- /dev/null
+++ b/src/EnvReader/XmlStructure/TextXmlStructure.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace jrosset\EnvReader\XmlStructure;
+
+use SimpleXMLElement;
+
+/**
+ * Structure about XML node's text
+ */
+class TextXmlStructure implements IXmlStructure {
+    /**
+     * @inheritDoc
+     */
+    public function parseXml (SimpleXMLElement $xmlNode): string {
+        return (string)$xmlNode;
+    }
+}
\ No newline at end of file