Is there a technique to combine a pipeline of XSL transformations into a single transformation?

Question

I have written an application which uses a pipeline of 15 XSL stylesheets, and I\'m beginning to work on tuning its performance. It\'s designed to be portable, so that it ca

Answer 1

There is a technique that allows independent transformations to be chained together where the output of the k-th transformation is the input of the (k+1)-th transformation.

Here is a simple example:

when this transformation is applied on the following XML document:

the wanted result (the first pass affffds the element as a child of the top element, then the second pass adds another child, , immediately after the element` that was created in the first pass) is produced:

There is a very suitable template/function in FXSL to do this: this is the compose-flist template. It takes as parameters an initial data argument and N functions (templates) and produces the chained composition of these functions/templates.

Here is the test example from the FXSL library:

  
  

  

  
  
  


  

    
    
    Compose:
    (*3).(*2) 3 = 
    
      
      
      
    

    
      
      
      
    

    Multi Compose:
    (*3).(*2).(*3) 2 = 
    
      
      
    
  

  
    

    
  

  
    

    
  

when this transformation is applied on any xml document (not used), the wanted, correct result is produced:

Compose:
(*3).(*2) 3 = 
18

Multi Compose:
(*3).(*2).(*3) 2 = 
36

Do note: In XSLT 2.0 and later no xxx:node-set() extension is necessary, and any of the chained transformations can be contained in a real function.