Re: [xsl] Filtering new tags using XSL

Subject: Re: [xsl] Filtering new tags using XSL
From: Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>
Date: Thu, 13 Sep 2007 10:36:40 -0400

Taking off from Mukul's and Abel's observations, one approach could be a transformation that would take two inputs.

The primary input would be the new (edited) file.

A secondary input would be the old file, before editing.

(If you no longer have that file, you're in trouble.)

One would have to presume that a data element appearing in the new file, which did not occur identically in the old file, would be new. To implement this, you would have to define "identical". For example, what if whitespace were entirely altered in the new file? (Maybe the editor had changed the indenting level.) Would this make all the entries "new"?


At 09:15 AM 9/13/2007, you wrote:
Buddhi Dananjaya wrote:

My customer may add new <data></data> blocks into this file, not always at the bottom (here and there) can anyone suggest a XSL format ( prefer sample code) to filter out newly added blocks..I need to get a new xml file which will contain new <data> blocks after transformation.

If you look at the data that he (your customer) provides, in what way can you, visually, distinguish new from old? And once you know it visually, how do you know it determinantly and evidently? In general, if you as a human cannot see the new from the old, then the computer won't be able to do so either.

To resolve this: either use a record of processed items or use a different data structure (like Mukul suggested: add a timestamp (but that is awkward when you are stuck with XSLT 1.0, I hope you can use 2.0 for that)).

-- Abel Braaksma

Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
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