MimeMap definition for IIS resources. Extensibility point in the WiX XML Schema. Schema extensions can register additional elements at this point in the schema. Id for the MimeMap. If the Id is not specified, it will be generated. Mime-type covered by the MimeMap. Extension covered by the MimeMap. Must begin with a dot. Extensibility point in the WiX XML Schema. Schema extensions can register additional attributes at this point in the schema.