- Added logical and (^) and or (V) operators. ...

- Added HTML-style aliases for <emph> (<em>), <underline> (<u>) and <variable> (<var>).
- Fixed <minus> in HTML.

- Added latexsym package to LaTeX preamble (needed for join operator). ...

- Added join, intersect and union operators.
- Deleted spaces in HTML versions of operators because they look weird in isolation.
  (Need to rethink this in general, as it will probably now look weird in equations!)

- Added set membership symbols for element, subset, superset.

- Added a <space> element to fix the occasional gobbled space.

- Added some spacing control to stop words getting jammed up against each other in LaTeX. (Only occurs when two elements are adjacent.)

- Added pi, sigma and rho maths symbols (relational algebra project, restrict and rename). ...

- Changed <typewriter> element to use <TT> in HTML instead of <CODE>.

- Added some deprecation messages. ...

- Rewrote image handling to use base-path parameter.

- Revamped document inclusion. ...

- Deprecated <latex-input>.

- Added underline support.

- Cleaned up formatting of paper codes.

- Removed <P> tags from "DT" template (invalid HTML).

- Added "question" template to stop bogus HTML generation when showanswers is switched on.

- Fixed fractions in HTML.

- Added missing \ensuremaths to <fraction>, <variable> and <function> templates.

- Added @align to <P>. ...

- Added "fill" option to @size in <vskip>.

- Changed "-72dpi" to "-96dpi" in the zoomed image template.

- Added blank lines after end of list environments to avoid weird numbering problem in derived LaTeX output.

- Added <pagebreak> and <newpage> synonyms for <page-break>. ...

- Added space around LaTeX tabulars so that they are placed in their own paragraph.
- Added <center> template.

- Added missing '/' to image paths (used to work?).

- Fixed display math in <item>.

- Removed extraneous "/" from image paths in LaTeX.

- Added right-arrow and left-arrow maths operators.

- Removed support for external environment.xml files.

- Tidied up default tabular alignment for LaTeX. ...

- Added <multi-column> templates.
- Changed <columns> to <tabular-columns> for consistency.
- Ensured distinction between tabular-columns/column and
  multi-column/column.
- Changed names of a few templates.

- Fixed header cells in HTML tabulars using an attribute value template.

- Added "percent" as an alternative for "percent-sign".

- Fixed figure and table numbering to not count preceding figures ...

and tables in <answer> when showanswers is off. Still seems to
  count them in <omit> though (and probably also <comment>).

- Images in HTML version now default to 96 dpi. ...

- Resolved merge conflict.

- Ensured that the content of <figure> and <table> is properly centered in HTML. ...

- Added <raw-latex> and <raw-html> as alternatives to <raw-code format="xx">.

- Added "sans-serif" template. ...

- Added "vskip" template.