[xsl] Sort on multiple elements

[Jitu <jibhatia@xxxxxxxxxxx>]

Hi

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.

For example :
<employees>
   <employee>
       <firstname>John<firstname>
       <lastname>Vinegar</lastname>
       <age>25</age>
       <salary>25000</salary>
   </employee>
   <employee>
       <firstname>Jim<firstname>
       <lastname>Vander</lastname>
       <age>27</age>
       <salary>15000</salary>
   </employee>
   <employee>
       <firstname>Joshua<firstname>
       <lastname>Raspberry</lastname>
       <age>35</age>
       <salary>24000</salary>
   </employee>
   <employee>
       <firstname>Norman<firstname>
       <lastname>Wolf</lastname>
       <age>45</age>
       <salary>75000</salary>
   </employee>
</employees>

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.

Your valuable inputs pls....



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