An XHTML+MathML+SVG profile is a profile that combines
XHTML 1.1 [XHTML11], MathML 2.0
[MathML2] and SVG 1.1
[SVG11] together. This profile
enables mixing XHTML, MathML and SVG in the same document using XML namespaces
[XMLNS] mechanism, while allowing
validation of such a mixed-namespace document. An XHTML 1.1 + MathML 2.0 +
SVG 1.1 DTD driver is provided.
An XHTML version of this document is conforming to this DTD.
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 second public Working Draft of an XHTML+MathML+SVG
profile for review by W3C Members and other interested parties.
This document does not define the normative
profile of XHTML + MathML + SVG. This is a possible profile.
Publication of this Working Draft by W3C indicates no endorsement by W3C or
the W3C Team, or any W3C Members.
It is an early draft document and may be updated, replaced or made obsolete
by other documents at any time. It is inappropriate to use W3C Working
Drafts as reference material or to cite them as other than "work in
progress".
At the time of publication, the Working Groups believed there were
zero patent disclosures relevant to this specification. A current list
of patent disclosures relevant to this specification may be found on
the patent disclosure pages on
XHTML,
MathML and
SVG.
An XHTML+MathML+SVG profile integrates XHTML 1.1
[XHTML11], MathML 2.0
[MathML2] and SVG 1.1
[SVG11] together, using
the XHTML Modularization Framework [XHTMLMOD].
This profile enables mixing XHTML, MathML and SVG in a same document
using XML namespaces [XMLNS]
mechanism, while allowing validation of such a mixed-namespace document.
An XHTML 1.1 + MathML 2.0 + SVG 1.1 DTD driver is provided in
section 2.1.
The possibility of combining those modules written in XML Schema
[XMLSchema] might be explored
when XML Schemas for XHTML [XHTMLMODSchema] and others become available
and mature.
This DTD driver can primarily be used for an XHTML document
that contains MathML and SVG fragments, but it can also be used
for an SVG document that contains XHTML and MathML fragments.
An SVG fragment inside an XHTML document can contain another
XHTML or MathML fragments, and that XHTML fragment can again
contain another MathML or SVG fragments. There's no restriction on
nesting levels.
Inside XHTML, MathML and SVG fragments are allowed basically anywhere inside
the document body. Inside SVG, XHTML and MathML may be embedded through
the foreignObject element (SVG 1.1
[SVG11], section 23.3).
A sample
document (MathML and SVG-enabled XHTML browsers only)
shows features in XHTML 1.1 (ruby) and simple MathML and
SVG examples, and a mixture of them using
foreignObject, in the same document.
On MathML and SVG-enabled XHTML browsers, mixed sample would be rendered
like this:
This DTD driver can also be used as a basis for defining other
profiles that combine some or all of XHTML, MathML and SVG.
How to define new profiles using this DTD driver is explained in
section 4.
"This version" of the DTD will be kept as is, while the "latest version"
of the DTD will evolve over time, e.g. it might incorporate errata and
add new features later. Users of this DTD driver should be aware of this
difference.
Note that each referenced DTD modules might also evolve over time.
Non-normative "snapshot" of all DTD modules at the time of publication
as a flattened DTD is available as follows:
The "latest version" of the flattened DTD will be kept up-to-date, too.
2.1. XHTML 1.1 + MathML 2.0 + SVG 1.1 DTD Driver
This section contains the driver for an XHTML 1.1 + MathML 2.0 + SVG 1.1
profile implementation as an XML DTD. It relies upon XHTML module
implementations defined in Modularization of XHTML
[XHTMLMOD] and in Ruby
Annotation [Ruby], the XHTML
1.1 DTD implementation defined in XHTML 1.1 [XHTML11], MathML DTD module implementations defined in
MathML 2.0 [MathML2],
and SVG DTD module implementations defined in SVG 1.1
[SVG11].
<!-- ....................................................................... -->
<!-- XHTML 1.1 plus MathML 2.0 plus SVG 1.1 DTD ........................... -->
<!-- URI: http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd
-->
<!-- XHTML 1.1 plus MathML 2.0 plus SVG 1.1 DTD
This is a prototype extension of XHTML 1.1 incorporating MathML 2.0
and SVG 1.1.
Copyright 2002 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 this 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 <altheim@eng.sun.com> (XHTML modules)
David Carlisle <davidc@nag.co.uk> (MathML modules)
Jun Fujisawa <fujisawa.jun@canon.co.jp> (SVG modules)
Masayasu Ishikawa <mimasa@w3.org> (DTD driver)
Revision:
$Id: xhtml-math-svg.dtd,v 1.26 2002/08/08 12:33:40 mimasa Exp $
-->
<!-- This is the driver for an XHTML 1.1 plus MathML 2.0 plus SVG 1.1 DTD.
-->
<!-- Switches to include/ignore each vocabulary.
-->
<!ENTITY % XHTML.module "INCLUDE" >
<!ENTITY % MATHML.module "INCLUDE" >
<!ENTITY % SVG.module "INCLUDE" >
<![%XHTML.module;[
<!ENTITY % XHTML.version
"-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN" >
]]>
<!-- Switches to enable subsets.
-->
<!ENTITY % XHTML.Basic.module "IGNORE" >
<!ENTITY % SVG.Basic.module "IGNORE" >
<!ENTITY % SVG.Tiny.module "IGNORE" >
<!-- Use the following entities to identify the namespaces:
-->
<!ENTITY % XHTML.xmlns "http://www.w3.org/1999/xhtml" >
<!ENTITY % MATHML.xmlns "http://www.w3.org/1998/Math/MathML" >
<!ENTITY % MATHML.pref.xmlns "http://www.w3.org/2002/Math/preference" >
<!ENTITY % SVG.xmlns "http://www.w3.org/2000/svg" >
<!ENTITY % XLINK.xmlns "http://www.w3.org/1999/xlink" >
<!-- Declare base URIs for the relevant DTD modules.
-->
<![%XHTML.module;[
<!ENTITY % XHTML.sysid.base
"http://www.w3.org/TR/xhtml-modularization/DTD/" >
]]>
<![%MATHML.module;[
<!ENTITY % MATHML.sysid.base
"http://www.w3.org/Math/DTD/mathml2/" >
]]>
<![%SVG.module;[
<!ENTITY % SVG.sysid.base
"http://www.w3.org/Graphics/SVG/1.1/DTD/" >
]]>
<!-- Declare system identifiers for the relevant DTD modules.
-->
<![%XHTML.module;[
<![%XHTML.Basic.module;[
<!ENTITY % XHTML.dtd.fpi
"-//W3C//DTD XHTML Basic 1.0//EN" >
<!ENTITY % XHTML.dtd.sysid
"http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd" >
]]>
<!ENTITY % XHTML.dtd.fpi
"-//W3C//DTD XHTML 1.1//EN" >
<!ENTITY % XHTML.dtd.sysid
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd" >
]]>
<![%MATHML.module;[
<!ENTITY % MATHML.dtd.sysid
"%MATHML.sysid.base;mathml2.dtd" >
<!ENTITY % MATHML.qname.sysid
"%MATHML.sysid.base;mathml2-qname-1.mod" >
]]>
<![%SVG.module;[
<![%SVG.Tiny.module;[
<!ENTITY % SVG.dtd.fpi
"-//W3C//DTD SVG 1.1 Tiny//EN" >
<!ENTITY % SVG.dtd.sysid
"%SVG.sysid.base;svg11-tiny.dtd" >
]]>
<![%SVG.Basic.module;[
<!ENTITY % SVG.dtd.fpi
"-//W3C//DTD SVG 1.1 Basic//EN" >
<!ENTITY % SVG.dtd.sysid
"%SVG.sysid.base;svg11-basic.dtd" >
]]>
<!ENTITY % SVG.dtd.fpi
"-//W3C//DTD SVG 1.1//EN" >
<!ENTITY % SVG.dtd.sysid
"%SVG.sysid.base;svg11.dtd" >
]]>
<!-- See the XHTML / MathML / SVG Qualified Names modules for information
on the use of namespace prefixes in the DTD. Default values are
as follows:
<!ENTITY % NS.prefixed "IGNORE" >
<!ENTITY % XHTML.prefixed "%NS.prefixed;" >
<!ENTITY % XHTML.prefix "" >
<!ENTITY % MATHML.prefixed "%NS.prefixed;" >
<!ENTITY % MATHML.prefix "m" >
<!ENTITY % MATHML.pref.prefixed "IGNORE" >
<!ENTITY % MATHML.pref.prefix "pref" >
<!ENTITY % SVG.prefixed "%NS.prefixed;" >
<!ENTITY % SVG.prefix "" >
<!ENTITY % XLINK.prefix "xlink" >
In this DTD driver, XHTML and MathML are not prefixed, and SVG is
prefixed by default. It can be changed by redeclaring the above
parameter entities.
-->
<!ENTITY % XHTML.prefixed "IGNORE" >
<!ENTITY % MATHML.prefixed "IGNORE" >
<!ENTITY % MATHML.prefix "m" >
<!ENTITY % MATHML.pref.prefixed "IGNORE" >
<!ENTITY % MATHML.pref.prefix "pref" >
<!ENTITY % SVG.prefixed "INCLUDE" >
<!ENTITY % SVG.prefix "svg" >
<!ENTITY % XLINK.prefix "xlink" >
<!-- a URI reference, see [URI] -->
<!ENTITY % URI.datatype "CDATA" >
<!-- Declare a parameter entity %XLINK.xmlns.attrib; containing
the XML Namespace declarations for XLink.
-->
<!ENTITY % XLINK.xmlns.attrib
"xmlns:%XLINK.prefix; %URI.datatype; #FIXED '%XLINK.xmlns;'"
>
<!-- Allow universal MathML stylesheet-related declarations.
When it is used, it must always be prefixed.
-->
<![%MATHML.module;[
<![%MATHML.pref.prefixed;[
<!ENTITY % MATHML.pref.renderer.extra "">
<!ENTITY % MATHML.pref.renderer
"css | mathplayer-dl | mathplayer | techexplorer-plugin | techexplorer">
<!ENTITY % MATHML.pref.xmlns.attrib
"xmlns:%MATHML.pref.prefix; %URI.datatype; #FIXED '%MATHML.pref.xmlns;'
%MATHML.pref.prefix;:renderer
( %MATHML.pref.renderer; %MATHML.pref.renderer.extra; ) #IMPLIED"
>
]]>
]]>
<!ENTITY % MATHML.pref.xmlns.attrib "" >
<!-- The parameter entities %SVG.xmlns.extra.attrib; and
%XHTML.xmlns.extra.attrib; may be redeclared to contain
any foreign namespace declarations for namespaces embedded
in XHTML+MathML+SVG. The default value is an empty string.
-->
<!ENTITY % SVG.xmlns.extra.attrib "" >
<!ENTITY % XHTML.xmlns.extra.attrib "" >
<!-- Declare parameter entities to define XML Namespace declarations
for SVG, XHTML and MathML.
-->
<![%SVG.module;[
<![%SVG.prefixed;[
<!ENTITY % SVG.xmlns.decl.attrib
"xmlns:%SVG.prefix; %URI.datatype; #FIXED '%SVG.xmlns;'"
>
]]>
<!ENTITY % SVG.xmlns.decl.attrib
"xmlns %URI.datatype; #FIXED '%SVG.xmlns;'"
>
]]>
<!ENTITY % SVG.xmlns.decl.attrib "" >
<![%XHTML.module;[
<![%XHTML.prefixed;[
<!ENTITY % XHTML.xmlns.decl.attrib
"xmlns:%XHTML.prefix; %URI.datatype; #FIXED '%XHTML.xmlns;'"
>
]]>
<!ENTITY % XHTML.xmlns.decl.attrib
"xmlns %URI.datatype; #FIXED '%XHTML.xmlns;'"
>
]]>
<!ENTITY % XHTML.xmlns.decl.attrib "" >
<![%MATHML.module;[
<![%MATHML.prefixed;[
<!ENTITY % MATHML.xmlns.decl.attrib
"xmlns:%MATHML.prefix; %URI.datatype; #FIXED '%MATHML.xmlns;'"
>
]]>
<!ENTITY % MATHML.xmlns.decl.attrib
"xmlns %URI.datatype; #FIXED '%MATHML.xmlns;'"
>
]]>
<!ENTITY % MATHML.xmlns.decl.attrib "" >
<!-- Declare common case for %NS.decl.attrib;.
-->
<!ENTITY % NS.common.decl.attrib
"%SVG.xmlns.decl.attrib;
%XHTML.xmlns.decl.attrib;
%MATHML.xmlns.decl.attrib;
%XLINK.xmlns.attrib;
%MATHML.pref.xmlns.attrib;
%SVG.xmlns.extra.attrib;
%XHTML.xmlns.extra.attrib;"
>
<!-- Redeclare the parameter entity %NS.decl.attrib; containing
all XML Namespace declarations used in the DTD, its form
dependent on whether prefixing is active.
-->
<![%SVG.prefixed;[
<![%XHTML.prefixed;[
<!-- SVG and XHTML are prefixed, MathML is either prefixed or not prefixed.
-->
<!ENTITY % NS.decl.attrib
"%NS.common.decl.attrib;"
>
]]>
<![%MATHML.prefixed;[
<!-- SVG and MathML are prefixed, XHTML is not prefixed.
-->
<!ENTITY % NS.decl.attrib
"%NS.common.decl.attrib;"
>
]]>
<!-- SVG is prefixed, XHTML and MathML are not prefixed.
MathML namespace must always be specified on the math element.
-->
<!ENTITY % NS.decl.attrib
"%SVG.xmlns.decl.attrib;
%XHTML.xmlns.decl.attrib;
%XLINK.xmlns.attrib;
%MATHML.pref.xmlns.attrib;
%SVG.xmlns.extra.attrib;
%XHTML.xmlns.extra.attrib;"
>
]]>
<![%XHTML.prefixed;[
<![%MATHML.prefixed;[
<!-- SVG is not prefixed, XHTML and MathML are prefixed.
-->
<!ENTITY % NS.decl.attrib
"%NS.common.decl.attrib;"
>
]]>
<!-- SVG and MathML are not prefixed, which is not allowed.
-->
<!ENTITY % NS.decl.attrib "" >
]]>
<!-- SVG, MathML and XHTML are all not prefixed, which is not allowed.
-->
<!ENTITY % NS.decl.attrib "" >
<!-- Redeclare parameter entities %SVG.xmlns.attrib; and
%XHTML.xmlns.attrib; containing all XML namespace declarations
used by XHTML+MathML+SVG, including a default xmlns declaration
when prefixing is inactive.
-->
<![%SVG.module;[
<!ENTITY % SVG.xmlns.attrib
"%NS.decl.attrib;"
>
]]>
<![%XHTML.module;[
<!ENTITY % XHTML.xmlns.attrib
"%NS.decl.attrib;"
>
]]>
<!-- Redeclare the parameter entity %MATHML.xmlns.extra.attrib;
containing XLink and MathML preferences namespace declarations
allowed on MathML elements.
-->
<![%MATHML.module;[
<!ENTITY % MATHML.xmlns.extra.attrib
"%XLINK.xmlns.attrib;
%MATHML.pref.xmlns.attrib;"
>
]]>
<!-- Framework Redeclaration placeholders ....................... -->
<![%XHTML.module;[
<!ENTITY % XHTML.redecl.module "INCLUDE" >
<![%XHTML.redecl.module;[
<!-- Pre-Framework Redeclaration placeholder .................... -->
<!ENTITY % xhtml-prefw-redecl.mod "" >
<!-- Post-Framework Redeclaration placeholder ................... -->
<!ENTITY % xhtml-postfw-redecl.mod "" >
]]>
]]>
<![%SVG.module;[
<!ENTITY % SVG.redecl.module "INCLUDE" >
<![%SVG.redecl.module;[
<!-- Pre-Framework Redeclaration placeholder ..................... -->
<!ENTITY % svg-prefw-redecl.mod "" >
<!-- Post-Framework Redeclaration placeholder .................... -->
<!ENTITY % svg-postfw-redecl.mod "" >
]]>
]]>
<!-- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -->
<!-- Declare MathML Qualified Names module as an extension of
XHTML's Qualified Names module.
-->
<![%MATHML.module;[
<!ENTITY % xhtml-qname-extra.decl
'PUBLIC "-//W3C//ENTITIES MathML 2.0 Qualified Names 1.0//EN"
"%MATHML.qname.sysid;"'
>
<!ENTITY % xhtml-qname-extra.mod
%xhtml-qname-extra.decl;
>
]]>
<!-- Declare location of math and svg contents in XHTML.
-->
<![%MATHML.module;[
<![%MATHML.prefixed;[
<!ENTITY % MATHML.pfx "%MATHML.prefix;:" >
]]>
<!ENTITY % MATHML.pfx "" >
<!ENTITY % math.qname "%MATHML.pfx;math" >
<!ENTITY % MATHML.math.class "| %math.qname;" >
]]>
<!ENTITY % MATHML.math.class "" >
<![%SVG.module;[
<![%SVG.prefixed;[
<!ENTITY % SVG.pfx "%SVG.prefix;:" >
]]>
<!ENTITY % SVG.pfx "" >
<!ENTITY % SVG.svg.qname "%SVG.pfx;svg" >
<!ENTITY % SVG.svg.class "| %SVG.svg.qname;" >
]]>
<!ENTITY % SVG.svg.class "" >
<![%XHTML.module;[
<![%XHTML.Basic.module;[
<!ENTITY % Misc.class
"%MATHML.math.class; %SVG.svg.class;" >
]]>
<!ENTITY % Misc.extra
"%MATHML.math.class; %SVG.svg.class;" >
]]>
<!-- Redeclare SVG's foreignObject content (allow anything).
-->
<![%SVG.module;[
<!ENTITY % SVG.foreignObject.content "ANY" >
]]>
<!-- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -->
<!-- Instantiate SVG DTD ........................................ -->
<![%SVG.module;[
<!ENTITY % SVG.dtd.decl
'PUBLIC "%SVG.dtd.fpi;"
"%SVG.dtd.sysid;"'
>
<!ENTITY % SVG.dtd %SVG.dtd.decl; >
%SVG.dtd;
]]>
<!-- Instantiate XHTML DTD ...................................... -->
<![%XHTML.module;[
<!ENTITY % XHTML.dtd.decl
'PUBLIC "%XHTML.dtd.fpi;"
"%XHTML.dtd.sysid;"'
>
<!ENTITY % XHTML.dtd %XHTML.dtd.decl; >
%XHTML.dtd;
]]>
<!-- instantiate MathML 2.0 DTD ................................. -->
<![%MATHML.module;[
<!ENTITY % MATHML.dtd.decl
'PUBLIC "-//W3C//DTD MathML 2.0//EN"
"%MATHML.dtd.sysid;"'
>
<!ENTITY % MATHML.dtd %MATHML.dtd.decl; >
%MATHML.dtd;
]]>
<!-- end of xhtml-math-svg.dtd -->
3. How to use XHTML 1.1 + MathML 2.0 +
SVG 1.1 DTD
This section is informative.
As shown in the above DTD driver, a couple of parameter entities are
prepared to switch on/off namespace prefixes and to change namespace
prefixes arbitrarily. The default values are as follows:
These parameter entities switch on/off namespace prefixing. Setting
the value to 'INCLUDE' makes namespace prefixing on,
and 'IGNORE' switches off namespace prefixing.
By default, XHTML and MathML are not prefixed, and SVG is prefixed
with 'svg:'.
These parameter entities set namespace prefixes for relevant
vocabularies. These values take effect only if relevant prefixing
is enabled. The same prefix may not be used for different vocabularies.
Note that XLink attributes must always be prefixed, so the value of
%XLINK.prefix; must not be an empty string.
There are also parameter entities that define system identifiers
for relevant DTD modules as follows:
When necessary, these parameter entities may be overridden to point to
local copies of those DTD modules, e.g. for off-line authoring. Authors
should not override these parameter entities when delivering the content.
3.1. XHTML as the Host Language
If authors want to use XHTML as the host language, this DTD driver may
be typically invoked as follows:
<!DOCTYPE html PUBLIC
"-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN"
"http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd">
If necessary, authors may change the above parameter entities as appropriate
in the internal DTD subset. A typical document might look something like
this:
If MathML is not prefixed, the MathML namespace must always be
declared on the math element to avoid
confusion of namespace defaulting with XHTML.
3.2. SVG as the Host Language
If authors want to use SVG as the host language, this DTD driver may
be typically invoked as follows:
<!DOCTYPE svg:svg PUBLIC
"-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN"
"http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd">
In this case SVG elements are still prefixed and XHTML and MathML
elements are not prefixed. In order to make SVG elements non-prefixed,
authors may adjust relevant parameter
entities in the internal DTD subset like this:
3.3. Using MathML with Universal
MathML stylesheet
When using MathML, authors may wish to use the "Universal MathML stylesheet"
[MathML-XSL] to make it
possible to be viewed on a large number of Web browsers. This DTD driver
allows authors to use this XSLT
stylesheet easily.
The DTD driver includes the following parameter entities:
Authors may include an XML stylesheet processing instruction for
the universal MathML stylesheet as explained in "Putting mathematics
on the Web with MathML" [MathML-XSL], and when they want to
specify preferences for the MathML renderer, they may set the
%MATHML.pref.prefixed; parameter entity to
"INCLUDE".
This allows authors to declare the MathML preferences namespace
and use the renderer attribute like this:
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="http://www.w3.org/Math/XSL/mathml.xsl"?>
<!DOCTYPE html PUBLIC
"-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN"
"http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd"[
<!ENTITY % MATHML.pref.prefixed "INCLUDE" >
]>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"
xmlns:pref="http://www.w3.org/2002/Math/preference"
pref:renderer="css">
<head> ... </head>
<body> ... </body>
</html>
The namespace prefix for the MathML preferences namespace may be
changed by redeclaring the %MATHML.pref.prefix;
parameter entity in the internal DTD subset.
4. How to define new profiles from XHTML 1.1 +
MathML 2.0 + SVG 1.1 DTD
This section is informative.
This DTD driver can also be used as a basis for defining other
profiles that combine some or all of XHTML, MathML and SVG.
This DTD driver has switches to include/ignore each vocabulary,
all set to "INCLUDE" by default:
For example, by redeclaring the %MATHML.module;
parameter entity to "IGNORE", this DTD driver
can be used as an XHTML 1.1 + SVG 1.1 DTD.
People might want to use other XHTML Family document type such as
XHTML Basic [XHTMLBasic]
instead of XHTML 1.1, or other SVG profiles like SVG Basic/Tiny
[SVGMobile] instead of full
SVG 1.1. There are predefined parameter entities to allow those subsets
easily, all set to "IGNORE" by default:
By redeclaring the %XHTML.Basic.module;
parameter entity to "INCLUDE", this DTD driver will use
XHTML Basic instead of XHTML 1.1 for XHTML part. Likewise,
%SVG.Basic.module; and
%SVG.Tiny.module; control whether to use
SVG Basic/Tiny instead of SVG 1.1, respectively.
When both %SVG.Basic.module; and
%SVG.Tiny.module; are set to "INCLUDE",
SVG Tiny will be used.
Using this mechanism, XHTML Basic + SVG Tiny DTD can be
simply written like this:
<!-- ....................................................................... -->
<!-- XHTML Basic plus SVG Tiny DTD ........................................ -->
<!-- URI: http://www.w3.org/2002/04/xhtml-math-svg/xhtml-basic-svg-tiny.dtd
-->
<!ENTITY % XHTML.version
"-//W3C//DTD XHTML Basic plus SVG Tiny//EN" >
<!ENTITY % XHTML.Basic.module "INCLUDE" >
<!ENTITY % MATHML.module "IGNORE" >
<!ENTITY % SVG.Tiny.module "INCLUDE" >
<!ENTITY % XHTML-MATH-SVG.dtd
PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN"
"http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd" >
%XHTML-MATH-SVG.dtd;
<!-- end of xhtml-basic-svg-tiny.dtd -->
In addition, each DTD is parameterized as
%XHTML.dtd;,
%MATHML.dtd; and
%SVG.dtd;,
so by redeclaring the relevant parameter entity to refer to a different
DTD, different profile may be easily defined.
5. Known limitations
This section is informative.
Although this DTD driver has taken a great stride to provide
as much flexibility as possible, there are some limitations,
mostly due to the limitation of the DTD mechanism itself.
Due to name collisions, XHTML and SVG, or MathML
and SVG cannot be used together without prefixing either of them.
Arbitrary prefixes can be chosen, but those cannot be
changed in the middle of the same document (e.g. if authors choose to
prefix SVG elements, authors have to always prefix them and have to use
the same prefix throughout the document, and they cannot use
defaulting in that document).
Only MathML and XLink namespace declarations are
allowed on MathML elements, and XHTML or SVG namespaces cannot be
declared.
This DTD driver is not designed to allow arbitrary
foreign namespaces (simply not possible with DTD). Adding yet another
vocabulary beyond XHTML+MathML+SVG may not be trivial, either.
ISSUE:
At the moment, inside SVG, XHTML and MathML fragments are only
allowed through the foreignObject
element. It would make sense to also allow those foreign namespace
fragments inside the desc and title elements. Future update of this profile
may allow such integration.
It is also under discussion whether to allow those foreign namespace
fragments directly inside elements like text
and tspan. Such a close integration would
be useful for mathematical diagrams, but the processing needs to be
clarified.
M. Baker, M. Ishikawa, S. Matsui, P. Stark, T. Wugofski, T. Yamakami,
eds., 19 December 2000.
Available at: http://www.w3.org/TR/2000/REC-xhtml-basic-20001219
The latest version is
available at: http://www.w3.org/TR/xhtml-basic
