template match syntax - possible bug in MSXML XPath

Hi,

let's consider this (not particulaty interesting) example:

--- snip ---
<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                version="1.0"
>

<xsl:template match="/">
        <xsl:apply-templates select="/*/@*" />
</xsl:template>

<xsl:template match="(xsl:transform|xsl:stylesheet)/@version">
        <xsl:value-of select="." />
</xsl:template>

</xsl:transform>
--- snip ---

1) MSXML's XSLT engine executes it, reporting no error (and printing "1.0"
when applied to an XSLT source).

2) Both Saxon and Xalan report errors when parsing the second template
(Saxon: Error in expression (xsl:transform|xsl:stylesheet)/@version:
Unexpected token
in pattern, found "(").

Now I realize that if Saxon (and Xalan) complain, they are probably right.

So:

a) Is this a conformance bug in Microsoft's implementation?

b) What's the most compact way to write the match in a syntax which is
actually allowed in XPath?

Julian


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