W3C

XHTML(TM) Basic

W3C Working Draft 10 February 2000

   This version:
          http://www.w3.org/TR/2000/WD-xhtml-basic-20000210
          (Plain text version, PostScript version, PDF version, ZIP
          archive, or Gzip'd TAR archive)

   Latest version:
          http://www.w3.org/TR/xhtml-basic

   Previous version:
          http://www.w3.org/TR/1999/WD-xhtml-basic-19991221

   Editors:
          Masayasu Ishikawa, W3C
          Shinichi Matsui, Panasonic
          Peter Stark, Phone.com
          Toshihiko Yamakami, Access Co., Ltd.

   Copyright (c) 1999-2000 W3C(R) (MIT, INRIA, Keio), All Rights
   Reserved. W3C liability, trademark, document use and software
   licensing rules apply.

Abstract

   The XHTML Basic document type is a subset of XHTML 1.1 [XHTML11]. It
   includes the minimal set of modules required to be an XHTML Family
   document type, and in addition it includes images, forms, and basic
   tables. It is designed for Web clients that do not support the full
   set of XHTML features; for example, Web clients such as mobile phones,
   PDAs, pagers, and settop boxes. The document type is rich enough for
   content authoring.

   The document type definition is implemented using XHTML modules as
   defined in "Modularization of XHTML" [XHTMLMOD].

Status of This Document

   This section describes the status of this document at the time of its
   publication. Other documents may supersede this document. The latest
   status of this document series is maintained at the W3C.

   This document is the "Last Call Working Draft" of "XHTML Basic". The
   Last Call review period ends at 2359Z on 15 March 2000. Please send
   review comments before the review period ends to
   www-html-editor@w3.org.

   Public discussion of HTML takes place on www-html@w3.org (archived).
   To subscribe send an email to <www-html-request@w3.org> with the word
   subscribe in the subject line.

   This document has been produced as part of the W3C HTML Activity, and
   it has been prepared by the Mobile Subgroup of the W3C HTML Working
   Group (members only) based on input from the WAP Forum Application's
   group and members of the W3C Mobile Access Interest Group (members
   only). This document will be used by the Mobile Subgroup of the W3C
   HTML Working Group and the W3C Mobile Access Interest Group to find a
   common ground for future markup languages aimed at content for small
   information appliances.

   This is work in progress, and does not imply endorsement by, nor the
   consensus of, either W3C membership, WAP Forum membership, or members
   of the HTML Working Group or the Mobile Access Interest Group. This is
   a draft document and may be updated, replaced or obsoleted by other
   documents at any time. It is inappropriate to cite this document as
   other than "work in progress". A list of current W3C Recommendations
   and other technical documents can be found at http://www.w3.org/TR.

Table of Contents

     1. Introduction
          1.1. XHTML for Small Information Appliances
          1.2. Background and Requirements
          1.3. Design Rationale
     2. Conformance
          2.1. Document Conformance
          2.2. User Agent Conformance
     3. The XHTML Basic Document Type
     4. How to Use XHTML Basic
     5. Acknowledgements
     A. References
          A.1. Normative References
          A.2. Informative References
     B. XHTML Basic Document Type Definition
          B.1. SGML Open Catalog Entry for XHTML Basic
          B.2. XHTML Basic Driver
          B.3. XHTML Basic Customizations

1. Introduction

  1.1. XHTML for Small Information Appliances

   HTML 4 was designed for large devices, overlapping windows/frames
   menus, mouse input pointing device, high powered CPU, large power
   supply. Requiring a full fledge computer for access to the World Wide
   Web excludes a large portion of the population from consumer device
   access of online information and services.

   Because there are many ways to subset HTML, there are many almost
   identical subsets defined by organizations and companies. Without a
   common base set of features, developing applications for a wide range
   of Web clients is difficult. Transformation between XHTML based
   languages is easier if they share a common set of elements. The goal
   of XHTML Basic is to converge various HTML subset into one common
   subset of XHTML.

   The document type definition for XHTML Basic is implemented based on
   the XHTML modules defined in Modularized XHTML [XHTMLMOD].

  1.2. Background and Requirements

   Information appliances are targeted for particular uses. They support
   the features they need for the functions they are designed to fulfill.
   The following are examples of different information appliances:

     * Mobile phones
     * Televisions
     * PDAs
     * Vending machines
     * Pagers
     * Car navigation systems
     * Mobile game machines
     * Digital book readers
     * Smart watches

   Existing subsets and variants of HTML for these clients include
   "Compact HTML" [CHTML], the Wireless Markup Language [WML], and the
   "HTML 4.0 Guidelines for Mobile Access" [GUIDELINES]. The common
   features found in these document types include:

     * Basic text (including headings, paragraphs, and lists)
     * Hyperlinks and links to related documents
     * Basic forms
     * Basic tables
     * Images
     * Meta information

   This set of HTML features has been the starting point for the design
   of XHTML Basic. The fact that most content developers are familiar
   with HTML makes it appropriate as a host language, that include markup
   modules from other languages using the methods described in "Building
   XHTML Modules" [XHTMLMOD]. For example, XHTML Basic may be extended
   with an Event Module that is more generic than the traditional HTML 4
   event system.

   It is not the intention of XHTML Basic to limit the functionality of
   future languages. But since the features in HTML 4 (frames, advanced
   tables, fixed set of attribute event handlers, and objects) were
   developed for a desktop computer type of client, they have proved to
   be inappropriate for many non-desktop devices. We believe XHTML Basic
   will be extended and built upon. Extending XHTML from a common and
   basic set of features, instead of many almost identical subsets or the
   too large set of functions in HTML 4, we think is good for
   interoperability on the Web, as well as scalability. Compared to the
   rich functionality of HTML 4, XHTML Basic may look like one step back,
   but in fact, it is two steps forward for clients that do not need what
   is in HTML 4 and for content developers that get one XHTML subset
   instead of many.

  1.3. Design Rationale

   This section explains why certain HTML features are not part of XHTML
   Basic.

    1.3.1. Style Sheets

   The style element is not supported. External Style sheets are
   recommended. The link element can be used to include external style
   sheets. The div and span elements and the class attribute are
   supported to hook style information onto the structure. Separation
   between structure and presentation allows user agents to download the
   style sheets if they support style sheets; user agents that do not
   support style sheets can ignore the external stylesheet. The media
   attribute can be used to select the appropriate stylesheets. See the
   section on "Media types" in the HTML 4.01 specification ([HTML4],
   section 14.2.4) for more details.

    1.3.2. Script and Events

   The script and noscript elements are not supported. Usually small
   devices have limited memory and CPU power. Execution of script
   programs may not be supported. Contents should be readable even if
   scripts are not executed.

   Event handler attributes used to invoke script programs are not
   supported. Events are device dependent. An incoming-call event is
   unlikely to happen in a television. A generic event handling mehanism
   would be more appropriate than hardwiring the event names in the
   document type definition.

    1.3.3. Presentation

   Many simple Web clients cannot display fonts other than monospace.
   Bi-directional text, bold faced font, and other text extension
   elements are not supported. However, phrasal elements such as
   emphasize, em, and headers are supported.

   It is recommended that style sheets are used to create a presentation
   that is appropriate for the device.

    1.3.4. Forms

   Basic XHTML forms ([XHTMLMOD], section 4.5.1) are supported. Since
   only devices with a local file system can take advantage of file and
   image input types in forms, they are not included in the basic forms.
   Also, content developers should keep in mind that users may not be
   able to input many characters from some devices (e.g a mobile phone).

    1.3.5. Tables

   Basic XHTML tables ([XHTMLMOD], section 4.6.1) are supported, but
   tables can be difficult to display on small devices. Content
   developers are recommended to follow the accessability guidelines for
   tables ([WAI-WEBCONTENT], Guideline 5). Note that in Basic Tables
   Module, nesting of tables is prohibited.

    1.3.6. Frames

   Frames are not supported. Frames depend on screen interface and are
   not part of XHTML 1.1.

    1.3.7. Objects

   Images are supported using the img element. The object and param
   elements are not supported. Limited input capabilities, for example no
   pointing device, has excluded image-maps.

2. Conformance

   This section is normative.

  2.1. Document Conformance

   A Conforming XHTML Basic document is a document that requires only the
   facilities described as mandatory in this specification. Such a
   document must meet all of the following criteria:

    1. It must validate against the DTD found in Appendix B.
    2. The root element of the document must be <html>.
    3. The name of the default namespace on the root element must be the
       XHTML namespace name, http://www.w3.org/1999/xhtml.
    4. There must be a DOCTYPE declaration in the document prior to the
       root element. If present, the public identifier included in the
       DOCTYPE declaration must reference the DTD found in Appendix B
       using its Formal Public Identifier. The system identifier may be
       modified appropriately.

           <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"
                                 "xhtml-basic10.dtd">

  2.2. User Agent Conformance

   The user agent must conform to the "User Agent Conformance" section of
   the XHTML specification ([XHTML1], section 3.2).

3. The XHTML Basic Document Type

   This section is normative.

   The XHTML Basic document type is defined as a set of XHTML modules.
   All XHTML modules are defined in the "Modularization of XHTML"
   specification [XHTMLMOD].

   XHTML Basic consists of the following XHTML modules:

   Structure Module*
          body, head, html, title

   Text Module*
          abbr, acronym, address, blockquote, br, cite, code, dfn, div,
          em, h1, h2, h3, h4, h5, h6, kbd, p, pre, q, samp, span, strong,
          var

   Hypertext Module*
          a

   List Module*
          dl, dt, dd, ol, ul, li

   Basic Forms Module
          form, input, label, select, option, textarea

   Basic Tables Module
          caption, table, td, th, tr

   Image Module
          img

   Meta Information Module
          meta

   Link Module
          link

   Base Module
          base

   (*) = This module is a required XHTML Family module.

   An XML 1.0 DTD is available in Appendix B.

   NOTE: Since the HTML event handler attributes are not included in
     XHTML Basic, form controls outside forms may not function as expected
     by the user.

4. How to Use XHTML Basic

   Although XHTML Basic can be used as it is, - a simple XHTML language
   with text, links, and images -, the intention with its simple design
   is to use it as a host language. A host language can contain a mix of
   vocabularies all rolled into one document type. It is natural that
   XHTML is the host language, since that is what most Web developers are
   used to.

   When markup from other languages is added to XHTML Basic, the
   resulting document type will be an extension of XHTML Basic. Content
   developers can develop for the XHTML Basic or take advantage of the
   extensions. The point is that XHTML Basic always is the common
   language that user agents supports. See "Building XHTML Modules"
   [BUILDING] for information about how to define markup language modules
   that are compatible with the modularization framework used by XHTML.

5. Acknowledgements

   Thanks to Gary Adams (Sun), Johan Hjelm (W3C/Ericsson), Wayne Carr
   (Intel) and the W3C HTML Working Group for contributing, reviewing and
   commenting on this document.

A. References

  A.1. Normative References

   [BUILDING]
          "Building XHTML Modules", W3C Working Draft, M. Altheim, S.
          McCarron, eds., 5 January 2000. Available at:
          http://www.w3.org/TR/2000/WD-xhtml-building-20000105
          The latest version is available at:
          http://www.w3.org/TR/xhtml-building

   [HTML4]
          "HTML 4.01 Specification", W3C Recommendation, D. Raggett, A.
          Le Hors, I. Jacobs, eds., 24 December 1999. Available at:
          http://www.w3.org/TR/1999/REC-html401-19991224
          The latest version is available at: http://www.w3.org/TR/html4

   [XHTML1]
          "XHTML 1.0: The Extensible HyperText Markup Language - A
          Reformulation of HTML 4 in XML 1.0", W3C Recommendation, Steven
          Pemberton et al., 26 January 2000. Available at:
          http://www.w3.org/TR/2000/REC-xhtml1-20000126
          The latest version is available at: http://www.w3.org/TR/xhtml1

   [XHTML11]
          "XHTML 1.1 - Module-based XHTML", W3C Working Draft, M.
          Altheim, S. McCarron, eds., 5 January 2000. Available at:
          http://www.w3.org/TR/2000/WD-xhtml11-20000105
          The latest version is available at:
          http://www.w3.org/TR/xhtml11

   [XHTMLMOD]
          "Modularization of XHTML", W3C Working Draft, M. Altheim et
          al., eds., 5 January 2000. Available at:
          http://www.w3.org/TR/2000/WD-xhtml-modularization-20000105
          The latest version is available at:
          http://www.w3.org/TR/xhtml-modularization

   [XML]
          "Extensible Markup Language (XML) 1.0", W3C Recommendation, T.
          Bray, J. Paoli, C. M. Sperberg-McQueen, eds., 10 February 1998.
          Available at: http://www.w3.org/TR/1998/REC-xml-19980210
          The latest version is available at:
          http://www.w3.org/TR/REC-xml

  A.2. Informative References

   [CHTML]
          "Compact HTML for Small Information Appliances", W3C Note, T.
          Kamada, 9 February 1998. Available at:
          http://www.w3.org/TR/1998/NOTE-compactHTML-19980209

   [GUIDELINES]
          "HTML 4.0 Guidelines for Mobile Access, W3C Note, T. Kamada, T.
          Asada, M. Ishikawa, S. Matsui, eds., 15 March 1999. Available
          at: http://www.w3.org/TR/1999/NOTE-html40-mobile-19990315
          The latest version is available at:
          http://www.w3.org/TR/NOTE-html40-mobile

   [WAI-WEBCONTENT]
          "Web Content Accessibility Guidelines 1.0", W3C Recommendation,
          W. Chisholm, G. Vanderheiden, I. Jacobs, eds., 5 May 1999.
          Available at: http://www.w3.org/TR/1999/WAI-WEBCONTENT-19990505
          The latest version is available at:
          http://www.w3.org/TR/WAI-WEBCONTENT

   [WML]
          "Wireless Markup Language Specification", WAP Forum Ltd.
          Available from http://www.wapforum.org/what/technical.htm

B. XHTML Basic Document Type Definition

   This appendix is normative.

  B.1. SGML Open Catalog Entry for XHTML Basic

   This section contains the SGML Open Catalog-format definition of the
   XHTML Basic FPI.

-- .......................................................................... --
-- File catalog  ............................................................ --

--  XHTML Basic Catalog Data File

    Revision:  $Id: xhtml-basic10.cat,v 2.2 2000/02/09 21:33:57 altheim Exp $ SMI

    See "Entity Management", SGML Open Technical Resolution 9401 for detailed
    information on supplying and using catalog data. This document is available
    from OASIS at URL:

        <http://www.oasis-open.org/cover/tr9401.html>
--

-- .......................................................................... --
-- SGML declaration associated with XHTML  .................................. --

OVERRIDE YES

SGMLDECL "xml1.dcl"

-- for use with non-Unicode compatible parsers: --
-- SGMLDECL "xml1n.dcl" --

-- :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: --

-- XHTML Basic DTD modular driver file  ..................................... --

PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"                       "xhtml-basic10.dtd"

-- XHTML Basic framework module ............................................. --

PUBLIC "-//W3C//ENTITIES XHTML Basic 1.0 Document Model 1.0//EN"  "xhtml-basic10-model-1.mod"


-- End of catalog data  ..................................................... --
-- .......................................................................... --

  B.2. XHTML Basic Driver

   This section contains the driver for the XHTML Basic document type
   implementation as an XML DTD. It relies upon XHTML module
   implementations defined in [XHTMLMOD].

<!-- XHTML Basic 1.0 DTD  ...................................................... -->
<!-- file: xhtml-basic10.dtd -->

<!-- XHTML Basic 1.0 DTD

     This is XHTML Basic, a proper subset of XHTML.

     Copyright 1998-2000 World Wide Web Consortium
        (Massachusetts Institute of Technology, Institut National de
         Recherche en Informatique et en Automatique, Keio University).
         All Rights Reserved.

     Permission to use, copy, modify and distribute the XHTML Basic DTD
     and its accompanying documentation for any purpose and without fee is
     hereby granted in perpetuity, provided that the above copyright notice
     and this paragraph appear in all copies.  The copyright holders make
     no representation about the suitability of the DTD for any purpose.

     It is provided "as is" without expressed or implied warranty.

        Editors:    Murray M. Altheim <mailto:altheim@eng.sun.com>
                    Peter Stark       <mailto:stark@corp.phone.com>
        Revision:   $Id: xhtml-basic10.dtd,v 2.3 2000/02/10 00:12:44 altheim Exp $ SMI

-->
<!-- This is the driver file for version 1.0 of the XHTML Basic DTD.

     Please use this formal public identifier to identify it:

         "-//W3C//DTD XHTML Basic 1.0//EN"
-->
<!ENTITY % XHTML.version  "-//W3C//DTD XHTML Basic 1.0//EN" >

<!-- Use this URI to identify the default namespace:

         "http://www.w3.org/1999/xhtml"

     See the Qualified Names module for information
     on the use of namespace prefixes in the DTD.
-->
<!ENTITY % XHTML.prefixed "IGNORE" >
<!ENTITY % XHTML.prefix  "" >

<!-- Reserved for use with the XLink namespace:
-->
<!ENTITY % XLINK.xmlns "" >
<!ENTITY % XLINK.xmlns.attrib "" >

<!-- For example, if you are using XHTML Basic 1.0 directly, use
     the FPI in the DOCTYPE declaration, with the xmlns attribute
     on the document element to identify the default namespace:

         <?xml version="1.0"?>
         <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"
                               "xhtml-basic10.dtd" >
         <html xmlns="http://www.w3.org/1999/xhtml"
               xml:lang="en" >
         ...
         </html>
-->

<!-- reserved for future use with document profiles -->
<!ENTITY % XHTML.profile  "" >

<!-- Bidirectional Text features
     This feature-test entity is used to declare elements
     and attributes used for bidirectional text support.
-->
<!ENTITY % XHTML.bidi  "IGNORE" >

<!-- :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -->

<!ENTITY % xhtml-events.module   "IGNORE" >
<!ENTITY % xhtml-bdo.module      "%XHTML.bidi;" >

<!ENTITY % xhtml-model.mod
     PUBLIC "-//W3C//ENTITIES XHTML Basic 1.0 Document Model 1.0//EN"
            "xhtml-basic10-model-1.mod" >

<!ENTITY % xhtml-framework.mod
     PUBLIC "-//W3C//ENTITIES XHTML Modular Framework 1.0//EN"
            "xhtml-framework-1.mod" >
%xhtml-framework.mod;

<!ENTITY % Pre.content
     "( #PCDATA
      | %Inlstruct.class;
      %Inlphras.class;
      %Anchor.class;
      %Inline.extra; )*"
>

<!ENTITY % xhtml-text.mod
     PUBLIC "-//W3C//ELEMENTS XHTML Text 1.0//EN"
            "xhtml-text-1.mod" >
%xhtml-text.mod;

<!ENTITY % xhtml-hypertext.mod
     PUBLIC "-//W3C//ELEMENTS XHTML Hypertext 1.0//EN"
            "xhtml-hypertext-1.mod" >
%xhtml-hypertext.mod;

<!ENTITY % xhtml-list.mod
     PUBLIC "-//W3C//ELEMENTS XHTML Lists 1.0//EN"
            "xhtml-list-1.mod" >
%xhtml-list.mod;

<!-- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -->

<!-- Image Module  ............................................... -->
<!ENTITY % xhtml-image.module "INCLUDE" >
<![%xhtml-image.module;[
<!ENTITY % xhtml-image.mod
     PUBLIC "-//W3C//ELEMENTS XHTML Images 1.0//EN"
            "xhtml-image-1.mod" >
%xhtml-image.mod;]]>

<!-- Tables Module ............................................... -->
<!ENTITY % xhtml-table.module "INCLUDE" >
<![%xhtml-table.module;[
<!ENTITY % xhtml-table.mod
     PUBLIC "-//W3C//ELEMENTS XHTML Basic Tables 1.0//EN"
            "xhtml-basic-table-1.mod" >
%xhtml-table.mod;]]>

<!-- Forms Module  ............................................... -->
<!ENTITY % xhtml-form.module "INCLUDE" >
<![%xhtml-form.module;[
<!ENTITY % xhtml-form.mod
     PUBLIC "-//W3C//ELEMENTS XHTML Basic Forms 1.0//EN"
            "xhtml-basic-form-1.mod" >
%xhtml-form.mod;]]>

<!-- Link Element Module  ........................................ -->
<!ENTITY % xhtml-link.module "INCLUDE" >
<![%xhtml-link.module;[
<!ENTITY % xhtml-link.mod
     PUBLIC "-//W3C//ELEMENTS XHTML Link Element 1.0//EN"
            "xhtml-link-1.mod" >
%xhtml-link.mod;]]>

<!-- Document Metainformation Module  ............................ -->
<!ENTITY % xhtml-meta.module "INCLUDE" >
<![%xhtml-meta.module;[
<!ENTITY % xhtml-meta.mod
     PUBLIC "-//W3C//ELEMENTS XHTML Metainformation 1.0//EN"
            "xhtml-meta-1.mod" >
%xhtml-meta.mod;]]>

<!-- Base Element Module  ........................................ -->
<!ENTITY % xhtml-base.module "INCLUDE" >
<![%xhtml-base.module;[
<!ENTITY % xhtml-base.mod
     PUBLIC "-//W3C//ELEMENTS XHTML Base Element 1.0//EN"
            "xhtml-base-1.mod" >
%xhtml-base.mod;]]>

<!ENTITY % xhtml-struct.mod
     PUBLIC "-//W3C//ELEMENTS XHTML Document Structure 1.0//EN"
            "xhtml-struct-1.mod" >
%xhtml-struct.mod;

<!-- end of XHTML Basic 1.0 DTD  ........................................... -->

  B.3. XHTML Basic Customizations

   An XHTML Family Document Type (such as XHTML Basic) must define the
   content model that it uses. This is done through a separate content
   model module that is instantiated by the XHTML Modular Framework. The
   content model module and the XHTML Basic Driver (above) work together
   to customize the module implementations to the document type's
   specific requirements. The content model module for XHTML Basic is
   defined below:

<!-- ....................................................................... -->
<!-- XHTML Basic 1.0 Document Model Module  .................................... -->
<!-- file: xhtml-basic10-model-1.mod

     This is XHTML Basic, a proper subset of XHTML.
     Copyright 1998-2000 W3C (MIT, INRIA, Keio), All Rights Reserved.
     Revision: $Id: xhtml-basic10-model-1.mod,v 2.2 2000/02/10 00:12:44 altheim Exp $ SMI

     This DTD module is identified by the PUBLIC and SYSTEM identifiers:

       PUBLIC "-//W3C//ENTITIES XHTML Basic 1.0 Document Model 1.0//EN"
       SYSTEM "xhtml-basic10-model-1.mod"

     Revisions:
     (none)
     ....................................................................... -->

<!-- XHTML Basic Document Model

     This module describes the groupings of elements that make up
     common content models for XHTML elements.
-->

<!-- Optional Elements in head  .............. -->

<!ENTITY % Head-opts.mix
     "( %Meta.qname; | %Link.qname; )*" >

<!-- Miscellaneous Elements  ................. -->

<!ENTITY % Misc.class "" >

<!-- Inline Elements  ........................ -->

<!ENTITY % Inlstruct.class "%Br.qname; | %Span.qname;" >

<!ENTITY % Inlphras.class
     "| %Em.qname; | %Strong.qname; | %Dfn.qname; | %Code.qname;
      | %Samp.qname; | %Kbd.qname; | %Var.qname; | %Cite.qname;
      | %Abbr.qname; | %Acronym.qname; | %Q.qname;" >

<!ENTITY % Inlpres.class "" >
<!ENTITY % I18n.class "" >
<!ENTITY % Anchor.class "| %A.qname;" >
<!ENTITY % Inlspecial.class "| %Img.qname;" >

<!ENTITY % Inline.extra
     "| %Input.qname; | %Select.qname; | %Textarea.qname;
      | %Label.qname;"
>

<!ENTITY % Inline.class
     "%Inlstruct.class;
      %Inlphras.class;
      %Anchor.class;
      %Inlspecial.class;
      %Inline.extra;"
>

<!ENTITY % Inline-noA.class
     "%Inlstruct.class;
      %Inlphras.class;
      %Inlspecial.class;
      %Inline.extra;"
>

<!ENTITY % Inline-noA.mix
     "%Inline-noA.class;
      %Misc.class;"
>

<!ENTITY % Inline.mix
     "%Inline.class;
      %Misc.class;"
>

<!-- Block Elements  ......................... -->

<!ENTITY % Heading.class
     "%H1.qname; | %H2.qname; | %H3.qname;
      | %H4.qname; | %H5.qname; | %H6.qname;"
>
<!ENTITY % List.class  "%Ul.qname; | %Ol.qname; | %Dl.qname;" >
<!ENTITY % Table.class "| %Table.qname;" >
<!ENTITY % Form.class  "| %Form.qname;" >

<!ENTITY % Blkstruct.class "%P.qname; | %Div.qname;" >
<!ENTITY % Blkphras.class
     "| %Pre.qname; | %Blockquote.qname; | %Address.qname;"
>
<!ENTITY % Blkpres.class "" >
<!ENTITY % Block.extra
     "%Table.class;
      %Form.class;"
>

<!ENTITY % Block.class
     "%Blkstruct.class;
      %Blkphras.class;
      %Block.extra;"
>

<!ENTITY % Block.mix
     "%Heading.class;
      | %List.class;
      | %Block.class;
      %Misc.class;"
>

<!-- All Content Elements  ................... -->

<!-- declares all content except tables
-->
<!ENTITY % Flow-noTable.mix
     "%Heading.class;
      | %List.class;
      | %Blkstruct.class;
      %Blkphras.class;
      %Form.class;
      | %Inline.class;
      %Misc.class;"
>

<!ENTITY % Flow.mix
     "%Heading.class;
      | %List.class;
      | %Block.class;
      | %Inline.class;
      %Misc.class;"
>

<!-- end of xhtml-basic10-model-1.mod -->