Merge different products belong to each standard

Question

I have to transform the following xml content,

    
        200057<         


        

Answer 1

Switching from imperative "pull" processing () to "push" processing, where you depend on the natural processing loop of the XSL engine, simplifies the stylesheet significantly.

This is essentially an "identity transform" plus one template to match Standard, and output only what we want from within it. The template for x:RelatedProduct copies those elements to the output verbatim and adds the RelationType element whose text is the name of the containing element.

Output is

    
      200057
      ISO
      1001
      
         
                1500163
            DraftProducts
         
         
                263973
                708519
                
            ReferenceProducts
         
         
                320056
                934789
                
            ReferenceProducts
         
         
                
                116881
                Identical
                NEN ISO 1001
            RelatedIntProducts
         
         
                208076
                116886
                Identical
                
            RelatedIntProducts
         
      
      1001
      1986
   
    
      200058
      ISO
      1002
      
         
                1500167
            DraftProducts
         
         
                263974
                708519
                
            ReferenceProducts
         
         
                320052
                934754
                
            ReferenceProducts
         
         
                
                116837
                Identical
                NEN ISO 1001
            RelatedIntProducts
         
         
                208074
                116843
                Identical
                
            RelatedIntProducts
         
      
      1005
      1983