sort()

Additional XPath Functions

sort

Sort a node set by the specified sort keys.


Function Summary
 
minimal arguments NodeSet sort (XPath expression, String sortKey)
 
all arguments NodeSet sort (XPath expression, String sortKey, String sortKey2, ...)
 

Required Arguments
 
XPath expression an XPath expression identifying the nodes to sort
String sortKey a quoted String containing an XPath expression for a sort key. The XPath expression is evaluated relative to each node in the node set being sorted. Optionally, the string my be suffixed with ::ascending or ::descending to indicate sort direction. The default sort direction is ascending.

Optional arguments
 
String sortKeyN a secondary sort key should previous keys have resulted in equality. Format rules are as with sorkKey.

Example
 
sort(/phonebook/entry, '@lastName')

returns a node set of phone book entries sorted by lastName

sort(/phonebook/entry, 'substring(@lastName, 1, 1)::descending', @firstName::ascending)

returns a node set of phone book entries sorted in reverse order by the first letter of lastName and, within each letter, alphabetically by firstName


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