paging mechanismDavid Carlisle davidc at nag.co.uk
Fri Feb 3 11:44:47 PST 2006
I tried this query: for $x at $pos in //text/body/idno for $y in $x/body/idno order by xs:decimal($x) ascending return $y where ($pos mod 50) < 2 return $x at each iteration in the above $x is a single idno element so $y is iterating over $x/body/idno which are idno grandchildren of these idno elements (which is empty) 'unexpected token "null" beyond end of query' Not quite the message I would have expected, but your query ends at the $y on line 4, you only have one FLWOR expression (which has two for clauses) so it can only have one "return" I was going to say what error message saxon gave here, but I see it gives the "null" message. (Michael?) If you delete the last two lines you get no error (but no result as $y is iterating over an empty sequence) I suggested (for $x idno order by number($x) return $x)[position() mod 50 =1] ^ in But having seen the input form you probably want (for $x in /col/text/body order by number($x/idno) return $x)[position() mod 50 =1] $ saxon8q -s col.xml col.xq <?xml version="1.0" encoding="UTF-8"?> <body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <idno>001</idno> </body> <body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <idno>051</idno> </body> <body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <idno>101</idno> </body> ________________________________________________________________________ This e-mail has been scanned for all viruses by Star. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk ________________________________________________________________________
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