XSL combining values of siblings if values of an attribute is same

Question

This is how my XML looks like

  &         


        

Answer 1

Here's a solution based on my answer to question #825783:

Stylesheet

  
  

  

  
  
    
      
    
  

  
  
    
      
      
      
    
  

  
    
    
    
      , 
    
  

  
  

Input

Using the input provided by JLRishe:

  

    

    
      
         "555" 
         "666" 
         "555" 
         "565" 
         "575" 
         "595" 
      
    
  

Output

This is different from JLRishe's output because I understood the requirement differently:

  
    
    
      
         "555" ,  "666" ,  "595" 
         "555" ,  "565" ,  "575"