| Name | Description | Type | Package | Framework |
| DocType | The DocType class encapsulates informations regarding the document type public and system IDs and root element name. | Class | org.apache.cocoon.components.serializers.util | Apache Cocoon |
| Namespaces | The Namespaces class is an utility class implementing a stack for XML namespaces declarations. | Class | org.apache.cocoon.components.serializers.util | Apache Cocoon |
| SGMLDocType | The SGMLDocType class encapsulates informations regarding the document type public and system IDs and root element name for SGML | Class | org.apache.cocoon.components.serializers.util | Apache Cocoon |