This registration has been submitted to community review and has been
approved by IESG for registration with IANA.
- Type name
-
application
- Subtype name
-
mathml-presentation+xml
- Required parameters
-
None
- Optional parameters
-
Same as charset parameter of
application/xml as specified in [RFC7303]
- Encoding considerations
-
The considerations of application/xml as specified in
[RFC7303] apply.
- Security considerations
-
As with other XML types and as noted in [RFC7303] section 10,
repeated expansion of maliciously constructed XML entities can be used
to consume large amounts of memory, which may cause XML processors in
constrained environments to fail.
Several MathML elements may cause arbitrary URIs to be referenced. In
this case, the security issues of [RFC3986], section 7, should be
considered.
In common with HTML, MathML documents may reference external media
such as images, style sheets, and scripting languages. Scripting
languages are executable content. In this case, the security
considerations in the Media Type registrations for those formats shall
apply. Similarly, MathML annotation elements may contain content intended for
execution or processing. In the case where the processor recognizes
and processes the additional content, or where further processing of
that content is dispatched to other processors, additional security
issues potentially arise. Since the normative semantics of the
MathML specification do not require processing of annotation elements, such
issues fall outside the domain of this registration document.
MathML may be used to describe mathematical expressions intended
for evaluation in computing systems. Because of the nature of
mathematics, a seemingly innocuous expression may lead to a
computation which does not terminate or is impractically large. This
introduces the risk that computational processors in constrained
environments may fail.
In addition, because of the extensibility features for MathML and of
XML in general, it is possible that application/mathml-presentation+xml may describe
content that has security implications beyond those described
here. However, if the processor follows only the normative semantics
of the MathML specification, this content will be outside the MathML namespace
and shall be ignored.
- Interoperability considerations
-
The MathML specifications describe processing semantics that dictate
behavior that must be followed when dealing with, among other things,
unrecognized elements and attributes, both in the MathML namespace and
in other namespaces.
Because MathML is extensible, conformant application/mathml-presentation+xml processors
must expect that content received is well-formed XML, but it cannot be
guaranteed that the content is valid to a particular DTD or Schema or
that the processor will recognize all of the elements and attributes
in the document.
MathML instances do not contain version numbers, so processors and producers must
follow the normative backward compatibility behavior described in the
MathML specifications.
In computational contexts, the result of evaluating a MathML
expression is system-specific, and is not guaranteed to be
interoperable between systems.
This normative text does not record a file extension for the media type
application/mathml-presentation+xml because we expect tools processing files
with MathML inside to have sufficient information with the generic media-type
(application/mathml+xml) while other content negotiation forms will take advantage
of specific media-types.
- Published specification
-
This media type registration is extracted from Appendix B
of the Mathematical Markup Language
(MathML) Version 3. specification but is a free-standing specification.
- Applications that use this media type
-
Web browsers, rendering engines, formula editors, typesetting software, search robots,
computing systems.
- Additional information
-
Magic number(s): see [RFC7303]
- File extension(s):
-
None
- Windows Clipboard Name:
-
MathML Presentation
- Macintosh file type code(s)
-
MMLp
- Macintosh Universal Type Identifier code
-
public.mathml.presentation conforming to
public.mathml (described above) conforming to public.xml
- Person & email address to contact for further information
-
Paul Libbrecht (member-math@w3.org). See the W3C Math Working Group home
page for more information.
- Intended usage
-
COMMON
- Restrictions on usage
-
None
- Author and Change controller
-
The MathML specification and this normative text are the products of the World Wide Web
Consortium's Math Working Group. The W3C has change control over
this normative text.