How do i remove all linebreaks?

Question

I have something like this:

   
      

        t         


        

Answer 1

The following transformation:

when applied against this XML document

    
        
        txt Y      
    

produces the wanted result:

txt A
txt X
txt Y
txt B

Do note the use of the standard XPath function normalize-space(), which strips off all leading and trailing spaces and replaces every sequence of other spaces with just one space.