| .gif) | BaseDefinitionAttribute | Represents a base definition of the current definition. | 
| .gif) | ContentTypeAttribute | Declares an association between an extension and a particular content type. | 
| .gif) | ContentTypeDefinition | Defines a content type. | 
| .gif) | DisplayNameAttribute | Provides a display name for an editor component part. | 
| .gif) | FileExtensionAttribute | Identifies a file extension. | 
| .gif) | FileExtensionToContentTypeDefinition | Specifies a mapping between a content type and a file extension. | 
| .gif) | MultipleBaseMetadataAttribute | A base class for attributes that can appear multiple times on a single component part. | 
| .gif) | NameAttribute | Associates a name with an editor extension part. | 
| .gif) | OrderAttribute | Orders multiple instances of an extension part. | 
| .gif) | Orderer | Performs a topological sort of orderable extension parts. | 
| .gif) | PropertyCollection | Allows property owners to control the lifetimes of the properties in the collection. | 
| .gif) | SingletonBaseMetadataAttribute | A base class for attributes that can appear only once on a single component part. |