<!--
  Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with
  the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
-->
<!-- ===================================================================

     Apache Documentation DTD (Version 2.0)

PURPOSE:
  This DTD was developed to create a simple yet powerful document
  type for software documentation for use with the Apache projects.
  It is an XML-compliant DTD and it's maintained by the Apache XML
  project.
  
  The v2.x series of this DTD is an evolution of the 1.x series, incorporating
  lessons learned. Various new much-needed elements have been added, some unused
  features removed, and some renamed (link -> a). 2.x is not
  backwards-compatible, although a stylesheet can probably do the conversion.

TYPICAL INVOCATION:

  <!DOCTYPE document PUBLIC
       "-//APACHE//DTD Documentation V2.1a//EN"
       "document-vxy.dtd">

  where

    x := major version
    y := minor version

NOTES:
  Many of the design patterns used in this DTD were take from the
  W3C XML Specification DTD edited by Eve Maler <elm@arbortext.com>.

  Where possible, great care has been used to reuse HTML tag
  names to reduce learning efforts and to allow HTML editors to be
  used for complex authorings like tables and lists.

EXTENSIBILITY:
  This DTD includes several empty placeholders that can be used to
  extend it. These placeholders are implemented with empty entities. Here
  is the list of those empty entities and what they are used for:

    - local.inline: this entity should contain extended definitions of
                    elements that can be used 'inline', or directly inside
                    the content. An example for this entity could be

                        <!ENTITY % local.inline "|citation">

    - local.blocks: this entity should contain extended definitions of
                    elements that behave as 'blocks', thus can be visually
                    rendered as areas on the canvas. An example for this
                    entity could be:

                        <!ENTITY % local.blocks "|poem">

    - local.sections: this entity should contain extended definitions of
                      elements that behave as 'sections', thus can be considered
                      containers of block-level elements. An example for
                      this entity could be:

                        <!ENTITY % local.sections "|chapter">

    - local.headers: this entity should contain extended definitions of
                     elements that behave as parts of the document header.
                     An example for this header could be:

                        <!ENTITY % local.headers ", notes?">

    - local.footers: this entity should contain extended definitions of
                     elements that behave as parts of the document footer.
                     An example for this header could be:

                        <!ENTITY % local.footers ", annotations*">

==================================================================== -->


<!-- =============================================================== -->
<!-- Include the Common ISO Character Entity Sets -->
<!-- =============================================================== -->

<!ENTITY % common-charents PUBLIC
    "-//APACHE//ENTITIES Common Character Entity Sets V1.0//EN"
    "../common-charents-v10.mod">
%common-charents;

<!-- =============================================================== -->
<!-- Document -->
<!-- =============================================================== -->

<!ENTITY % document PUBLIC
    "-//APACHE//ENTITIES Documentation V2.0a//EN"
    "document-v20.mod">
%document;

<!-- =============================================================== -->
<!-- End of DTD -->
<!-- =============================================================== -->
