2001-03-05 DTD update

The following detail the changes made to the DTD in the 2001-03-05 DTD update. See also the change log.

1. Improvements to math tagging

The following changes have been made to improve how maths are handled:

alternativemath disallowed in alternativemath alternativemath used to have the same content model as formula. This has now been changed so that alternativemath can only appear in formula.
content model of formula slightly adjusted so that
- each formula must contain one of (math | simplemath | file | tex)
- that element can then be followed by 0 or more alternativemath elements

2. title can contain formula

The title element now allows formula to appear as a sub-element.

3. formula given 'source' attribute

In cases where alternative versions of a formula exist, the formula element has been given a source attribute to indicate what the original source of the formula was.

4. name element and transliterated names

The following changes have been made to name to allow tagging of transliterated names:

alternativename element created to contain transliterated name
fullname element created to contain the author's complete name where necessary
file now allowed in fullname, forenames and surname for cases where transliterated names have been supplied as graphics

5. subject and type attributes

subject, subjectgroup, rating and ratinggroup have been given type attributes.

6. strikethrough formatting

A new element strike has been created to allow tagging of strikethrough text.

7. Translated legends

A language attribute has been added to legend to allow tagging of translated legends.

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