I have the following XML input document:

    1
    2
    3
    4
    
        5
        6
    
    
        7
        8
    

The task is to flatten the data in descendants of the 'data' element to a plain text file so that each value of a descendant element of a certain element name is combined with each value of the elements of a different name.

To solve that I wrote the following stylesheet that first groups the data with for-each-group and then processes those groups with a recursive named template:

When I run that stylesheet with Saxon 9 or AltovaXML tools 2010 I get the output I want, namely

val_A,val_B,val_C,val_D,val_E,val_F
1,3,,5,,7
1,3,,5,,8
1,3,,6,,7
1,3,,6,,8
1,4,,5,,7
1,4,,5,,8
1,4,,6,,7
1,4,,6,,8
2,3,,5,,7
2,3,,5,,8
2,3,,6,,7
2,3,,6,,8
2,4,,5,,7
2,4,,5,,8
2,4,,6,,7
2,4,,6,,8

When I run the stylesheet with Intel's XSLT 2.0 processor I get a completely different result:

val_D,val_D,val_B,val_F,val_A,val_F,val_A,val_C,val_E,val_B
1,2,3,4,,5,6,,7,8

That seems to be a bug with Intel's processor.