Friends,
To expand on David's post, I find it easier and less liable
to error to express the variable this way when I want a
string: XLST 1.0
<xsl:variable name="temp_id">SORTOUT</xsl:variable>
The problem here is that you are creating a temporary tree, which has a
root and a single text node child. Doing a value-of on the tree will
return the string 'SORTOUT', as it returns all the text-nodes for the
tree concatenated together, however, there is comparitively massive cost
in constructing the tree and the holding it in memory.
Using <xsl:variable name="temp_id" select="'SORTOUT'"/> simply binds the
string to the variable, and incurs no tree creation costs or the extra
memory use.
So, although they appear very similar as using value-of on either
technique produces the same result, they are actually quite different.
The rule of thumb is - if it's possible to do all the work in the select
attribute do it there.
cheers
andrew
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