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Re: writing to a file in xslt

Subject: Re: writing to a file in xslt
From: David Carlisle <davidc@xxxxxxxxx>
Date: Wed, 07 Apr 2010 17:42:46 +0100
Re:  writing to a file in xslt
On 07/04/2010 16:45, a kusa wrote:

> So is there any way to write to another file in XSLT? If I can do
> that, then maybe I can compare the next value by reading that new
> file.

So for example, I have a folder with 5 XML files. When I am processing
the first XML file, I go read the external text file and grab the
first value and assign it to this first XML file.
Now, when processing the second XML file, I again go to grab the next
value from the external file, but this time I have to compare this
value with what was assigned to XML file number 1, and if they are the
same, I have to increment this value by 1 before assigning it to the
second XML file.

That's a very imperative way of describing your problem. A literal translation of that into XSLT would be to use a recursive template, processing one file at a time and passing the accumulated data on as a parameter. However if you have a more declarative description of your processing then a simpler XSLT idiom may suggest itself. For example
what you describe has a hint of grouping about it and your assignment is a group counter. If you can describe your grouping condition then you can group on that and just use position() to count groups, rather than accumulating the data by hand.

The writing of files here is a side issue, the main ideas are the same if you are generating element nodes within one file. in most cases you can use XSLT constructs such as muenchian grouping (xslt 1) or for-each-group (xslt 2) but in cases where they don't have enough flexibility you can use recursion over a sequence and have full manual control over the data processed at each iteration.


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