XSLT: moving a grouping html elements into section levels

Question

I\'m trying to write an XSLT that organizes an HTML file into different section levels depending on the header level. Here is my input:

Answer 1

An XSLT 1.0 solution (essentially borrowed by Jenni Tennison):

when this transformation is applied on the following XML document:

    
        
1
        
1
        
1.1
        
2
        
1.1.1
        
3
        
1.2
        
4
        
2
        
5
        
2.1
        
6
    

the wanted result is produced:

   

      1
      
1
      

         1.1
         
2
         

            1.1.1
            
3
         
      
      

         1.2
         
4
      
   
   

      2
      
5
      

         2.1
         
6