diff --git a/extensions/yii/apidoc/commands/RenderController.php b/extensions/yii/apidoc/commands/RenderController.php
index 8a46de3938..cbd97aeefc 100644
--- a/extensions/yii/apidoc/commands/RenderController.php
+++ b/extensions/yii/apidoc/commands/RenderController.php
@@ -129,11 +129,7 @@ class RenderController extends Controller
 				return null;
 			},
 			'only' => ['.php'],
-			'except' => array_merge($except, [
-				'/views/',
-				'/requirements/',
-				'/gii/generators/',
-			]),
+			'except' => $except,
 		];
 		return FileHelper::findFiles($path, $options);
 	}
diff --git a/extensions/yii/apidoc/helpers/Markdown.php b/extensions/yii/apidoc/helpers/Markdown.php
index 682603dd7e..6139b15e62 100644
--- a/extensions/yii/apidoc/helpers/Markdown.php
+++ b/extensions/yii/apidoc/helpers/Markdown.php
@@ -13,6 +13,7 @@ use yii\apidoc\models\TypeDoc;
 use yii\apidoc\templates\BaseRenderer;
 
 /**
+ * A Markdown helper with support for class reference links.
  *
  * @author Carsten Brandt <mail@cebe.cc>
  * @since 2.0
diff --git a/extensions/yii/apidoc/models/BaseDoc.php b/extensions/yii/apidoc/models/BaseDoc.php
index c470ab5618..9c8cfb92ce 100644
--- a/extensions/yii/apidoc/models/BaseDoc.php
+++ b/extensions/yii/apidoc/models/BaseDoc.php
@@ -12,6 +12,7 @@ use phpDocumentor\Reflection\DocBlock\Tag\SinceTag;
 use yii\base\Object;
 
 /**
+ * Base class for API documentation information.
  *
  * @author Carsten Brandt <mail@cebe.cc>
  * @since 2.0
diff --git a/extensions/yii/apidoc/models/ClassDoc.php b/extensions/yii/apidoc/models/ClassDoc.php
index d9b17a4809..020105f2e3 100644
--- a/extensions/yii/apidoc/models/ClassDoc.php
+++ b/extensions/yii/apidoc/models/ClassDoc.php
@@ -8,6 +8,7 @@
 namespace yii\apidoc\models;
 
 /**
+ * Represents API documentation information for a `class`.
  *
  * @author Carsten Brandt <mail@cebe.cc>
  * @since 2.0
diff --git a/extensions/yii/apidoc/models/ConstDoc.php b/extensions/yii/apidoc/models/ConstDoc.php
index a0fbf08acc..1f185da9f5 100644
--- a/extensions/yii/apidoc/models/ConstDoc.php
+++ b/extensions/yii/apidoc/models/ConstDoc.php
@@ -8,6 +8,7 @@
 namespace yii\apidoc\models;
 
 /**
+ * Represents API documentation information for a `constant`.
  *
  * @author Carsten Brandt <mail@cebe.cc>
  * @since 2.0
diff --git a/extensions/yii/apidoc/models/EventDoc.php b/extensions/yii/apidoc/models/EventDoc.php
index 41771c52c5..2c15f3d1e2 100644
--- a/extensions/yii/apidoc/models/EventDoc.php
+++ b/extensions/yii/apidoc/models/EventDoc.php
@@ -11,6 +11,7 @@ use phpDocumentor\Reflection\DocBlock\Tag\ParamTag;
 use phpDocumentor\Reflection\DocBlock\Tag\ReturnTag;
 
 /**
+ * Represents API documentation information for an `event`.
  *
  * @author Carsten Brandt <mail@cebe.cc>
  * @since 2.0
diff --git a/extensions/yii/apidoc/models/FunctionDoc.php b/extensions/yii/apidoc/models/FunctionDoc.php
index 232d236f8b..82c09ec279 100644
--- a/extensions/yii/apidoc/models/FunctionDoc.php
+++ b/extensions/yii/apidoc/models/FunctionDoc.php
@@ -14,6 +14,7 @@ use phpDocumentor\Reflection\DocBlock\Tag\ThrowsTag;
 use yii\base\Exception;
 
 /**
+ * Represents API documentation information for a `function`.
  *
  * @author Carsten Brandt <mail@cebe.cc>
  * @since 2.0
diff --git a/extensions/yii/apidoc/models/InterfaceDoc.php b/extensions/yii/apidoc/models/InterfaceDoc.php
index 57cd9ce21f..10b6d65576 100644
--- a/extensions/yii/apidoc/models/InterfaceDoc.php
+++ b/extensions/yii/apidoc/models/InterfaceDoc.php
@@ -8,6 +8,7 @@
 namespace yii\apidoc\models;
 
 /**
+ * Represents API documentation information for an `interface`.
  *
  * @author Carsten Brandt <mail@cebe.cc>
  * @since 2.0
diff --git a/extensions/yii/apidoc/models/MethodDoc.php b/extensions/yii/apidoc/models/MethodDoc.php
index 0f7288fbf5..e31d31cbd6 100644
--- a/extensions/yii/apidoc/models/MethodDoc.php
+++ b/extensions/yii/apidoc/models/MethodDoc.php
@@ -8,6 +8,7 @@
 namespace yii\apidoc\models;
 
 /**
+ * Represents API documentation information for a `method`.
  *
  * @author Carsten Brandt <mail@cebe.cc>
  * @since 2.0
diff --git a/extensions/yii/apidoc/models/ParamDoc.php b/extensions/yii/apidoc/models/ParamDoc.php
index 2be9de84c7..de6ef5d23d 100644
--- a/extensions/yii/apidoc/models/ParamDoc.php
+++ b/extensions/yii/apidoc/models/ParamDoc.php
@@ -11,6 +11,7 @@ use yii\apidoc\helpers\PrettyPrinter;
 use yii\base\Object;
 
 /**
+ * Represents API documentation information for a [[FunctionDoc|function]] or [[MethodDoc|method]] `param`.
  *
  * @author Carsten Brandt <mail@cebe.cc>
  * @since 2.0
diff --git a/extensions/yii/apidoc/models/PropertyDoc.php b/extensions/yii/apidoc/models/PropertyDoc.php
index dbe4a2085d..b865fba765 100644
--- a/extensions/yii/apidoc/models/PropertyDoc.php
+++ b/extensions/yii/apidoc/models/PropertyDoc.php
@@ -11,6 +11,7 @@ use phpDocumentor\Reflection\DocBlock\Tag\VarTag;
 use yii\apidoc\helpers\PrettyPrinter;
 
 /**
+ * Represents API documentation information for a `property`.
  *
  * @author Carsten Brandt <mail@cebe.cc>
  * @since 2.0
diff --git a/extensions/yii/apidoc/models/TraitDoc.php b/extensions/yii/apidoc/models/TraitDoc.php
index 37f1799806..1169f997d6 100644
--- a/extensions/yii/apidoc/models/TraitDoc.php
+++ b/extensions/yii/apidoc/models/TraitDoc.php
@@ -8,6 +8,7 @@
 namespace yii\apidoc\models;
 
 /**
+ * Represents API documentation information for a `trait`.
  *
  * @author Carsten Brandt <mail@cebe.cc>
  * @since 2.0
diff --git a/extensions/yii/apidoc/models/TypeDoc.php b/extensions/yii/apidoc/models/TypeDoc.php
index a4c68d2060..6561fc7217 100644
--- a/extensions/yii/apidoc/models/TypeDoc.php
+++ b/extensions/yii/apidoc/models/TypeDoc.php
@@ -12,6 +12,7 @@ use yii\base\Exception;
 use yii\helpers\StringHelper;
 
 /**
+ * Base class for API documentation information for classes, interfaces and traits.
  *
  * @author Carsten Brandt <mail@cebe.cc>
  * @since 2.0