diff --git a/Module/infoLayout.json b/Module/infoLayout.json
new file mode 100644
index 000000000..438c82273
--- /dev/null
+++ b/Module/infoLayout.json
@@ -0,0 +1,35 @@
+{
+    "name": {
+        "id": "^[1-9]\\d*",
+        "internal": "[a-zA-Z0-9]+",
+        "external": "[a-zA-Z0-9]+"
+    },
+    "category": "[a-zA-Z0-9]+",
+    "version": "([0-9]+\\.){2}[0-9]+",
+    "requirements": {
+        ".*": ".*"
+    },
+    "creator": {
+        "name": ".+",
+        "website": ".*"
+    },
+    "description": ".+",
+    "directory": "[a-zA-Z0-9]+",
+    "dependencies": {
+        ".*": ".*"
+    },
+    "providing": {
+        ".*": ".*"
+    },
+    "load": [
+        {
+            "pid": [
+                ".*"
+            ],
+            "type": "^[1-9]\\d*",
+            "for": "^([1-9]\\d*)|([a-zA-Z0-9]+)",
+            "from": "[a-zA-Z0-9]+",
+            "file": "[a-zA-Z0-9]*"
+        }
+    ]
+}
diff --git a/Validation/Base/DateTime.php b/Validation/Base/DateTime.php
index 4c75ef7e6..f068942b4 100644
--- a/Validation/Base/DateTime.php
+++ b/Validation/Base/DateTime.php
@@ -32,6 +32,6 @@ abstract class DateTime extends ValidatorAbstract
      */
     public static function isValid($value, array $constraints = null) : bool
     {
-        return (bool) strtotime($value);
+        return (bool) \strtotime($value);
     }
 }
diff --git a/Validation/Base/Json.php b/Validation/Base/Json.php
new file mode 100644
index 000000000..2c5d1de84
--- /dev/null
+++ b/Validation/Base/Json.php
@@ -0,0 +1,225 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 7.2
+ *
+ * @package    phpOMS\Validation\Base
+ * @copyright  Dennis Eichhorn
+ * @license    OMS License 1.0
+ * @version    1.0.0
+ * @link       http://website.orange-management.de
+ */
+declare(strict_types=1);
+
+namespace phpOMS\Validation\Base;
+
+use phpOMS\Validation\ValidatorAbstract;
+use phpOMS\Utils\ArrayUtils;
+
+/**
+ * Validate date.
+ *
+ * @package    phpOMS\Validation\Base
+ * @license    OMS License 1.0
+ * @link       http://website.orange-management.de
+ * @since      1.0.0
+ */
+abstract class Json extends ValidatorAbstract
+{
+
+    /**
+     * {@inheritdoc}
+     */
+    public static function isValid($value, array $constraints = null) : bool
+    {
+        return true;
+    }
+
+    /**
+     * Validate array against a template array.
+     *
+     * @param array $template Template structure
+     * @param array $source   Source structure
+     * @param bool  $perfect  No additional elements in source allowed
+     *
+     * @return bool
+     *
+     * @since  1.0.0
+     */
+    public static function validateTemplate(array $template, array $source, bool $perfect = false) : bool
+    {
+        $templatePaths = self::createAllViablePaths($template, '');
+        $sourcePaths   = self::createAllViablePaths($source, '');
+
+        $isComplete = self::isCompleteSource($templatePaths, $sourcePaths);
+        if (!$isComplete) {
+            return false;
+        }
+
+        if ($perfect) {
+            $perfectFit = self::hasTemplateDefinition($templatePaths, $sourcePaths);
+            if (!$perfectFit) {
+                return false;
+            }
+        }
+
+        $isValid = self::isValidSource($templatePaths, $sourcePaths);
+        if (!$isValid) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * Create all viable paths and their values
+     *
+     * @param array  $arr  Array
+     * @param string $path Current path
+     *
+     * @return array
+     *
+     * @since  1.0.0
+     */
+    private static function createAllViablePaths(array $arr, string $path = '') : array
+    {
+        $paths = [];
+        foreach ($arr as $key => $value) {
+            $tempPath = $path . '/' . $key;
+
+            if (\is_array($value)) {
+                $paths += self::createAllViablePaths($value, $tempPath);
+            } else {
+                $paths[$tempPath] = $value;
+            }
+        }
+
+        return $paths;
+    }
+
+    /**
+     * Check if source array has additional elements.
+     *
+     * @param array $template Template structure
+     * @param array $source   Source structure
+     *
+     * @return bool Returns false in case of undefined elements
+     *
+     * @since  1.0.0
+     */
+    private static function hasTemplateDefinition(array $template, array $source) : bool
+    {
+        $completePaths = [];
+        foreach ($template as $key => $value) {
+            $key                 = \str_replace('/0', '/.*', $key);
+            $completePaths[$key] = $value;
+        }
+
+        foreach ($source as $sPath => $sValue) {
+            $hasDefinition = false;
+
+            foreach ($completePaths as $tPath => $tValue) {
+                if ($tPath === $sPath
+                    || \preg_match('~' . \str_replace('/', '\\/', $tPath) . '~', $sPath) === 1
+                ) {
+                    $hasDefinition = true;
+                    break;
+                }
+            }
+
+            if (!$hasDefinition) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * Check if source array is complete
+     *
+     * @param array $template Template structure
+     * @param array $source   Source structure
+     *
+     * @return bool
+     *
+     * @since  1.0.0
+     */
+    private static function isCompleteSource(array $template, array $source) : bool
+    {
+        $completePaths = [];
+        foreach ($template as $key => $value) {
+            $key = \str_replace('/0', '/.*', $key);
+
+            if (\stripos($key, '/.*') !== false) {
+                continue;
+            }
+
+            $completePaths[$key] = $value;
+        }
+
+        foreach ($completePaths as $tPath => $tValue) {
+            $sourceIsComplete = false;
+
+            foreach ($source as $sPath => $sValue) {
+                if ($tPath === $sPath
+                    || \preg_match('~' . \str_replace('/', '\\/', $tPath) . '~', $sPath) === 1
+                ) {
+                    unset($completePaths[$tPath]);
+                    break;
+                }
+            }
+        }
+
+        return count($completePaths) === 0;
+    }
+
+    /**
+     * Check if source array is correct
+     *
+     * @param array $template Template structure
+     * @param array $source   Source structure
+     *
+     * @return bool
+     *
+     * @since  1.0.0
+     */
+    private static function isValidSource(array $template, array $source) : bool
+    {
+        $validPaths = [];
+        foreach ($template as $key => $value) {
+            $key              = \str_replace('/0', '/\d*', $key);
+            $validPaths[$key] = $value;
+        }
+
+        foreach ($source as $sPath => $sValue) {
+            $sourceIsValid = false;
+            $foundPath     = false;
+
+            foreach ($validPaths as $tPath => $tValue) {
+                if (!$foundPath
+                    && ($tPath === $sPath
+                        || \preg_match('~' . \str_replace('/', '\\/', $tPath) . '~', $sPath) === 1)
+                ) {
+                    $foundPath = true;
+                }
+
+                if (($tPath === $sPath
+                        || \preg_match('~' . \str_replace('/', '\\/', $tPath) . '~', $sPath) === 1)
+                    && ($tValue === $sValue
+                        || \preg_match('~' . ((string) $tValue) . '~', (string) $sValue) === 1)
+                ) {
+                    $sourceIsValid = true;
+                    break;
+                }
+            }
+
+            if (!$sourceIsValid && $foundPath) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+}
diff --git a/tests/Validation/Base/JsonTest.php b/tests/Validation/Base/JsonTest.php
new file mode 100644
index 000000000..6aa0ce8cc
--- /dev/null
+++ b/tests/Validation/Base/JsonTest.php
@@ -0,0 +1,38 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 7.2
+ *
+ * @package    tests
+ * @copyright  Dennis Eichhorn
+ * @license    OMS License 1.0
+ * @version    1.0.0
+ * @link       http://website.orange-management.de
+ */
+
+namespace phpOMS\tests\Validation\Base;
+
+use phpOMS\Validation\Base\Json;
+
+class JsonTest extends \PHPUnit\Framework\TestCase
+{
+    public function testJson()
+    {
+        $template = \json_decode(file_get_contents(__DIR__ . '/json/template.json'), true);
+
+        $valid = \json_decode(file_get_contents(__DIR__ . '/json/valid.json'), true);
+        self::assertTrue(Json::validateTemplate($template, $valid));
+        self::assertTrue(Json::validateTemplate($template, $valid, true));
+
+        $additional = \json_decode(file_get_contents(__DIR__ . '/json/additional.json'), true);
+        self::assertTrue(Json::validateTemplate($template, $additional));
+        self::assertFalse(Json::validateTemplate($template, $additional, true));
+
+        $incomplete = \json_decode(file_get_contents(__DIR__ . '/json/incomplete.json'), true);
+        self::assertFalse(Json::validateTemplate($template, $incomplete));
+
+        $invalid = \json_decode(file_get_contents(__DIR__ . '/json/invalid.json'), true);
+        self::assertFalse(Json::validateTemplate($template, $invalid));
+    }
+}
diff --git a/tests/Validation/Base/json/additional.json b/tests/Validation/Base/json/additional.json
new file mode 100644
index 000000000..ae511e6a2
--- /dev/null
+++ b/tests/Validation/Base/json/additional.json
@@ -0,0 +1,58 @@
+{
+    "name": {
+        "id": 1001100000,
+        "internal": "Tasks",
+        "external": "Tasks"
+    },
+    "category": "Tools",
+    "version": "1.0.0",
+    "requirements": {
+        "phpOMS": "1.0.0",
+        "phpOMS-db": "1.0.0"
+    },
+    "creator": {
+        "name": "Orange Management",
+        "website": "www.spl1nes.com"
+    },
+    "tooMuch": 1,
+    "description": "Tasks module.",
+    "directory": "Tasks",
+    "dependencies": {
+        "Admin": "1.0.0",
+        "Calendar": "1.0.0",
+        "Media": "1.0.0",
+        "Editor": "1.0.0"
+    },
+    "providing": {
+        "Navigation": "*"
+    },
+    "load": [
+        {
+            "pid": [
+                "/backend/task"
+            ],
+            "type": 4,
+            "for": 0,
+            "from": "Tasks",
+            "file": "Tasks"
+        },
+        {
+            "pid": [
+                "/backend"
+            ],
+            "type": 4,
+            "from": "Tasks",
+            "for": "Navigation",
+            "file": "Tasks"
+        },
+        {
+            "pid": [
+                "/backend"
+            ],
+            "type": 5,
+            "from": "Tasks",
+            "for": "Navigation",
+            "file": "Navigation"
+        }
+    ]
+}
diff --git a/tests/Validation/Base/json/incomplete.json b/tests/Validation/Base/json/incomplete.json
new file mode 100644
index 000000000..7e5c95864
--- /dev/null
+++ b/tests/Validation/Base/json/incomplete.json
@@ -0,0 +1,56 @@
+{
+    "name": {
+        "id": 1001100000,
+        "internal": "Tasks",
+        "external": "Tasks"
+    },
+    "category": "Tools",
+    "requirements": {
+        "phpOMS": "1.0.0",
+        "phpOMS-db": "1.0.0"
+    },
+    "creator": {
+        "name": "Orange Management",
+        "website": "www.spl1nes.com"
+    },
+    "description": "Tasks module.",
+    "directory": "Tasks",
+    "dependencies": {
+        "Admin": "1.0.0",
+        "Calendar": "1.0.0",
+        "Media": "1.0.0",
+        "Editor": "1.0.0"
+    },
+    "providing": {
+        "Navigation": "*"
+    },
+    "load": [
+        {
+            "pid": [
+                "/backend/task"
+            ],
+            "type": 4,
+            "for": 0,
+            "from": "Tasks",
+            "file": "Tasks"
+        },
+        {
+            "pid": [
+                "/backend"
+            ],
+            "type": 4,
+            "from": "Tasks",
+            "for": "Navigation",
+            "file": "Tasks"
+        },
+        {
+            "pid": [
+                "/backend"
+            ],
+            "type": 5,
+            "from": "Tasks",
+            "for": "Navigation",
+            "file": "Navigation"
+        }
+    ]
+}
diff --git a/tests/Validation/Base/json/invalid.json b/tests/Validation/Base/json/invalid.json
new file mode 100644
index 000000000..3e5e2ddd9
--- /dev/null
+++ b/tests/Validation/Base/json/invalid.json
@@ -0,0 +1,57 @@
+{
+    "name": {
+        "id": "abc",
+        "internal": "Tasks",
+        "external": "Tasks"
+    },
+    "category": "Tools",
+    "version": "1.0.0",
+    "requirements": {
+        "phpOMS": "1.0.0",
+        "phpOMS-db": "1.0.0"
+    },
+    "creator": {
+        "name": "Orange Management",
+        "website": "www.spl1nes.com"
+    },
+    "description": "Tasks module.",
+    "directory": "Tasks",
+    "dependencies": {
+        "Admin": "1.0.0",
+        "Calendar": "1.0.0",
+        "Media": "1.0.0",
+        "Editor": "1.0.0"
+    },
+    "providing": {
+        "Navigation": "*"
+    },
+    "load": [
+        {
+            "pid": [
+                "/backend/task"
+            ],
+            "type": 4,
+            "for": 0,
+            "from": "Tasks",
+            "file": "Tasks"
+        },
+        {
+            "pid": [
+                "/backend"
+            ],
+            "type": 4,
+            "from": "Tasks",
+            "for": "Navigation",
+            "file": "Tasks"
+        },
+        {
+            "pid": [
+                "/backend"
+            ],
+            "type": 5,
+            "from": "Tasks",
+            "for": "Navigation",
+            "file": "Navigation"
+        }
+    ]
+}
diff --git a/tests/Validation/Base/json/template.json b/tests/Validation/Base/json/template.json
new file mode 100644
index 000000000..438c82273
--- /dev/null
+++ b/tests/Validation/Base/json/template.json
@@ -0,0 +1,35 @@
+{
+    "name": {
+        "id": "^[1-9]\\d*",
+        "internal": "[a-zA-Z0-9]+",
+        "external": "[a-zA-Z0-9]+"
+    },
+    "category": "[a-zA-Z0-9]+",
+    "version": "([0-9]+\\.){2}[0-9]+",
+    "requirements": {
+        ".*": ".*"
+    },
+    "creator": {
+        "name": ".+",
+        "website": ".*"
+    },
+    "description": ".+",
+    "directory": "[a-zA-Z0-9]+",
+    "dependencies": {
+        ".*": ".*"
+    },
+    "providing": {
+        ".*": ".*"
+    },
+    "load": [
+        {
+            "pid": [
+                ".*"
+            ],
+            "type": "^[1-9]\\d*",
+            "for": "^([1-9]\\d*)|([a-zA-Z0-9]+)",
+            "from": "[a-zA-Z0-9]+",
+            "file": "[a-zA-Z0-9]*"
+        }
+    ]
+}
diff --git a/tests/Validation/Base/json/valid.json b/tests/Validation/Base/json/valid.json
new file mode 100644
index 000000000..f76e67023
--- /dev/null
+++ b/tests/Validation/Base/json/valid.json
@@ -0,0 +1,57 @@
+{
+    "name": {
+        "id": 1001100000,
+        "internal": "Tasks",
+        "external": "Tasks"
+    },
+    "category": "Tools",
+    "version": "1.0.0",
+    "requirements": {
+        "phpOMS": "1.0.0",
+        "phpOMS-db": "1.0.0"
+    },
+    "creator": {
+        "name": "Orange Management",
+        "website": "www.spl1nes.com"
+    },
+    "description": "Tasks module.",
+    "directory": "Tasks",
+    "dependencies": {
+        "Admin": "1.0.0",
+        "Calendar": "1.0.0",
+        "Media": "1.0.0",
+        "Editor": "1.0.0"
+    },
+    "providing": {
+        "Navigation": "*"
+    },
+    "load": [
+        {
+            "pid": [
+                "/backend/task"
+            ],
+            "type": 4,
+            "for": 0,
+            "from": "Tasks",
+            "file": "Tasks"
+        },
+        {
+            "pid": [
+                "/backend"
+            ],
+            "type": 4,
+            "from": "Tasks",
+            "for": "Navigation",
+            "file": "Tasks"
+        },
+        {
+            "pid": [
+                "/backend"
+            ],
+            "type": 5,
+            "from": "Tasks",
+            "for": "Navigation",
+            "file": "Navigation"
+        }
+    ]
+}