XSLT grouping on multiple keys using Muenchian method

Question

This is the input file.

All these blocks are wrapped in a tag which is not appearing, dunno why? And all these blocks are wrapped in a

Answer 1

If the hd1 element is always '1234' then you are not really grouping by them, but if you were you would define a simple key like so

For the second key, you would need to take account of the Code element

And then for the last key, you would define a more complicated key to cope with all the elements

Do note the use of the 'pipe' character as the delimiter. It is important to pick a delimited that would never occur in any of the selected elements.

Then, to look for the distinct header1 elements, you would look for the elements which appear first in the header1 key

To find the distinct Code elements within each header1 element, you would do the following

Finally, within each code group, to find the distinct 'header3' elements, you would look for the first elements within the third key

Here is the full XSLT

Do note the use of the mode attribute on the template matching to distinguish between the multiple templates all matching the AllocFile elements.

When applied to your sample XML, the following is output

   1234
   
      033195
      
         147
         125487
         11
         9
         
            1
            11/10
            
20090401
            8000000
         
         
            2
            14/10
            
20090401
            8400000
         
         
            3
            74/10
            
20090401
            8740000
         
      
   
   
      033118
      
         117
         125487
         19
         9
         
            2
            74/10
            
20090401
            74512
         
      
   
   
      033147
      
         117
         125487
         19
         9
         
            3
            14/10
            
20090401
            986541
         
      
   

If you did have different hd1 elements, other than '1234' you would end up with multiple Header1 elements, and so your output would not be well-formed XML. It would be simple enough to wrap them in a root element though by modified the initial template matching the document element.