RE: Can solve the N-queens - but can't count!

Subject: RE: Can solve the N-queens - but can't count!
From: Kay Michael <Michael.Kay@xxxxxxx>
Date: Fri, 18 Jun 1999 12:20:20 +0100
> >
> >	<xsl:apply-templates select="$var/a[@b='x']" />
> >
> >or
> >	<xsl:value-of select="$var/a" />
> It happens that neither of the above is a valid pattern 
> because variables cannot be used *as* location steps.

They are not valid patterns but they are valid node-set expressions, and
therefore valid in this context.

[18] PathExpr ::= FilterExpr / RelativeLocationPath
[19] FilterExpr ::= PrimaryExpr
[14] PrimaryExpr ::= VariableReference

(But they are not valid, following the thread further back, if $var is of
type document fragment. Section 6.2.2 says: The "/" operator combines an
arbitrary expression and a relative location path. It is an error if the
expression does not evaluate to a node-set.)

Mike Kay

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