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Kam ChanSubject: How to break down a sequence and return a few subsequences
Author: Kam Chan
Date: 30 Jun 2009 07:18 PM
I need to write a function that given a sequence of items, create and return a sequence of sub-sequences, with each sub-sequences containing "like" items.

For example:
given a sequence of 'a', 'b', c', 1', '2', 3','x','y','z'

I want the function to return something like:
( ('a', 'b', 'c'), ('1', '2', '3'), ('x', 'y', 'z'))

I don't need to go into the detail of how the items are decided to be in which sub-sequence. (In this above example, it might be each subsequence contains 3 items.)

But I don't know the mechanics of creating a new sub-sequences.

Any help is appreciated.

Kam

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Ivan PedruzziSubject: How to break down a sequence and return a few subsequences
Author: Ivan Pedruzzi
Date: 30 Jun 2009 09:52 PM
XQuery does not allow sequence of sequences, the result is always a flat sequence that combines all values.

Have a look at fn:subsequence to extract a range of values.
http://www.w3.org/TR/xpath-functions/#func-subsequence

Hope this helps
Ivan

Posttop
Kam ChanSubject: How to break down a sequence and return a few subsequences
Author: Kam Chan
Date: 01 Jul 2009 09:18 AM
Ivan, thanks for the info. No wonder I can't find any information, functions or examples regarding that.

   
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