DOCBOOK-APPS: XSL implementation of DBTeXMath

[Allin Cottrell <cottrell@wfu.edu>]

I have just got around to trying Jirka Kosek's xsl version of the
DBTeXMath files that I made available late last year.

The xsl version stumbles on some material that is OK in the sgml
version.  For example:

        <informalequation>
        <alt>
         \begin{eqnarray*}
          y_t &=& \alpha + \beta(1/x_t) + \epsilon_t\\
          y_t &=& \alpha + \beta x_t + \gamma x^2_t + \epsilon_t\\
          y_t &=& \alpha + \beta \log x_t + \epsilon_t\\
          \log y_t &=& \alpha + \beta \log x_t + \epsilon_t
         \end{eqnarray*}
        </alt>
        <graphic fileref="figures/nonlin.png"/>
        </informalequation>

This is processed fine by jade, but using saxon and xsl I get the
error:

  Error on line 215 column 10 of
  file:/home/allin/stats/esl/gretl/doc/xml/appendices.xml:
    Error reported by XML parser: name expected (found "=")
  Transformation failed: Run-time errors were reported

Line 215 contains the first occurrence of "&=&".  Anyone know of a
workaround for this?

-- 
Allin Cottrell
Department of Economics
Wake Forest University, NC