The W3C Math Working Group has posted an updated working draft of Mathematical Markup Language (MathML) Version 3.0.:
The present draft is an incremental one making public some of the results of Math Working Group work in recent months. The biggest difference this time is in Chapter 4, although there have been smaller ameliorations throughout the specification. A more detailed description of changes from the previous Recommendation follows.
With the second Working Draft, much of the non-normative explication that formerly was found in Chapters 1 and 2, and many examples from elsewhere in the previous MathML specifications, were removed from the MathML3 specification and planned to be incorporated into a MathML Primer being prepared as a separate document. It is expected this will help the use of this formal MathML3 specification as a reference document in implementations, and offer the new user better help in understanding MathML's deployment. The remaining content of Chapters 1 and 2 is being edited to reflect the changes elsewhere in the document, and in the rapidly evolving Web environment. Some of their text used to go back to early days of the Web and XML, and its explanations are now commonplace.
Chapter 3, on presentation-oriented markup, in this draft adds new material on linebreaking and on markup for elementary math notations. Material introduced in the last draft revising the
mactionelements has been further revised as a result of active discussion. In addition, the layout of schemata such as that for long division have been carefully revised with an eye to the demands mathematics as an international language. This has resulted in the introduction of new
mlongdivand other associated elements. Earlier work, as recorded in the W3C Note Arabic mathematical notation, has allowed clarification of the relationship with bidirectional text and examples with RTL text have been added.
Chapter 4, on content-oriented markup, contains major changes and additions in this Working Draft. The meaning of the actual content remains as before in principle, but a lot of work has been done on expressing it better. A few new elements have been added.
Chapter 5 is being refined as its purpose has been further clarified to deal with the mixing of markup languages. This chapter deals, in particular, with interrelations of parts of the MathML specification, especially with presentation and content markup.
Chapter 6 is a new addition which deals with the issues of interaction of MathML with a host environment. This chapter deals with interrelations of the MathML specification with XML and HTML, but in the context of deployment on the Web. In particular there is a discussion of the interaction of CSS with MathML.
Chapter 7 replaces the previous Chapter 6, and has been rewritten and reorganized to reflect the new situation in regard to Unicode, and the changed W3C context with regard to named character entities. The new W3C specification of Entity Definitions for Characters in XML, which incorporates those used for mathematics is becoming a public working draft [Entities]. It is expected that some new ancillary tables will be provided that reflect requests the Math WG has received.
The Appendices, of which there are eight shown, have been reworked. Appendix A now contains the new RelaxNG schema for MathML3 as well as discussion of MathML3 DTD issues. Appendix B addresses media types associated with MathML and implicitly constitutes a request for the registration of three new ones, as is now standard for work from the W3C. Appendix C contains a new simplified and reconsidered Operator Dictionary. Appendices D, E, F, G and H contain similar non-normative material to that in the previous specification, now appropriatley updated.