Re: Setting Sort From Variable

> select={$orderBy}"

select attributes in XSLT _always_ take Xpath expressions and Xpath
expressions don't have {} (unless they are part of a string)

You want

select="$orderBy"

But actually you don't want that as there is no point in using 
the same sort key for every item as then there can be no sorting.

Looking at your later code I think you want

<xsl:sort select="@forename[$filterOrderBy = 'forename']|
                  @surname[not($filterOrderBy = 'forename')]"/>

David

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