Re: [xsl] Sort on multiple elements

["J.Pietschmann" <j3322ptm at yahoo dot de>]

Jitu wrote:
> i can use multiple xsl:sort statements, to sort on many elements.
> But my problem is i do not know in advance, how many levels of sorting 
> is required.
...
> I may want to sort
> by lastname
> OR
> by lastname,firstname (sort first by lastname and within it sort by 
> firstname)
> OR
> by salary, age, lastname (sort by salary and within it sort by age and 
> within that sort by lastname)
>
> This fact i do not know in advance therefore i cannot hardcode it into 
> my xsl. In other words i cannot write a fixed number of xsl:sort 
> statements.
Note that you have to pull tricks to sort for
a dynamical element name. As for the levels,
code for the maximum level and use a non-existant
field for the unused sort levels, for example
 <xsl:param name="level1" select="'lastname'"/>
 <xsl:param name="level2" select="'firstname'"/>
 <xsl:param name="level3" select="'*'"/> <!-- invalid for any element name -->
...
  <xsl:for-each select="employee">
    <xsl:sort select="*[name()=$level1]"/>
    <xsl:sort select="*[name()=$level2]"/>
    <xsl:sort select="*[name()=$level3]"/>
   ...


HTH
J.Pietschmann


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