RE: Eliminating Duplicates - With sets of attributes

Which grouping technique are you using? XSLT 1.0 or 2.0?

Doing this using xsl:for-each-group or Muenchian grouping can be done just
by concatenating the values. The only technique which doesn't extend to this
case is the xx[not(.=preceding-sibling::xx)] approach.

Michael Kay
http://www.saxonica.com/ 

> -----Original Message-----
> From: Thimmegowda, Balaji [mailto:balaji_thimmegowda@xxxxxxxxx] 
> Sent: 08 June 2007 16:22
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject:  Eliminating Duplicates - With sets of 
> attributes defining uniqueness
> 
> Hi,
> 
> Consider the following XML :
> 
> <Book>
> 	<Chapter Desc="Desc1" sample="sample1" ID="ID1" name="chapter1"
> free="no"/>
> 	<Chapter Desc="Desc1" sample="sample1" ID="ID1" name="chapter2"
> free="no"/>
> 	<Chapter Desc="Desc2" sample="sample2" ID="ID1" name="chapter1"
> free="no"/>
> 	<Chapter Desc="Desc1" sample="sample1" ID="ID1" name="chapter1"
> free="no"/>
> 	<Chapter Desc="Desc1" sample="sample1" ID="ID1" name="chapter1"
> free="yes"/>
> </Book>
> <Book>
> 	<Chapter Desc="Desc1" sample="sample1" ID="ID1" name="chapter1"
> free="no"/>
> 	<Chapter Desc="Desc1" sample="sample1" ID="ID1" name="chapter1"
> free="no"/>
> 	<Chapter Desc="Desc2" sample="sample2" ID="ID1" name="chapter1"
> free="no"/>
> 	<Chapter Desc="Desc1" sample="sample1" ID="ID1" name="chapter1"
> free="no"/>
> 	<Chapter Desc="Desc1" sample="sample1" ID="ID2" name="chapter1"
> free="no"/>
> </Book>
> 
> The attributes "ID", "name" and "free" are the ones that I 
> need to check for uniqueness.
> The combination of each of this attribute with the attributes, "Desc"
> and "sample", makes it unique.
> 
> For instance :
> When the attribute is "ID", a combination of "Desc","sample" and "ID"
> has to be unique within the current "Book" element.
> When the attribute is "name", a combination of 
> "Desc","sample" and "name" has to be unique within the 
> current "Book" element.
> When the attribute is "free", a combination of 
> "Desc","sample" and "free" has to be unique within the 
> current "Book" element.
> 
> So, the output from the 1st Book element should be as follows :
> 
> Output from 1st Chapter element
> <res>Desc1_sample1_ID1</res>
> <res>Desc1_sample1_chapter1</res>
> <res>Desc1_sample1_no</res>
> 
> Output from the 2nd Chapter element
> <res>Desc1_sample1_chapter2</res>
> 
> Output from the 3rd Chapter element
> <res>Desc2_sample2_ID1</res>
> <res>Desc2_sample2_chapter1</res>
> <res>Desc2_sample2_no</res>
> 
> Output from the 4th Chapter element
> NONE - Since its a duplicate
> 
> Output from the 5th Chapter element
> <res>Desc1_sample1_yes</res>
> 
> The output from the 2nd Book element should be as follows :
> 
> Output from the 1st Chapter element
> <res>Desc1_sample1_ID1</res>
> <res>Desc1_sample1_chapter1</res>
> <res>Desc1_sample1_no</res>
> 
> Output from the 2nd Chapter element
> NONE - Since its a duplicate
> 
> Output from the 3rd Chapter element
> <res>Desc2_sample2_ID1</res>
> <res>Desc2_sample2_chapter1</res>
> <res>Desc2_sample2_no</res>
> 
> Output from the 4th Chapter element
> NONE - Since its a duplicate
> 
> Output from the 5th Chapter element
> <res>Desc1_sample1_ID2</res>
> 
> I have tried out a few stylesheets and I was able to 
> eliminate the duplicates by considering all the attributes 
> within the "Chapter"
> elements. But, I am not able to get it to work the way I have 
> mentioned here.
> 
> Any help is greatly appreciated.
> 
> Thanks in advance,
> BT.
> 
> 
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