Transform to remove duplicate and copy rest

Question

I want the output xml to have grouped for the element \'c\', according to the attribute \'f\'. Here is my input xml and the xslt. I want the group to occur only once and the ot

Answer 1

This transformation:

when applied on the provided XML document:

   
      
         
            Al
            
               Y
               
                  FTO
               
            
         
      
   
  
    
      
        Al
        
          Y
          
            FTO
          
        
      
    
  
  
    
      
        Al
        
          Y
          
            FTO
          
        
      
    
  
  
    
      
    
  

produces the wanted, correct result:

   
      
         
            Al
            
               Y
               
                  FTO
               
            
         
      
   
   
      
         
            Al
            
               Y
               
                  FTO
               
            
         
      
   
   
      
         
      
   

Explanation:

Proper use of the Muenchian grouping method.