> I am trying to navigate through a graph by going through 
> every path between elements. 
> I face the problem of not being able to accumulate the 
> visited paths(links between elements). The graph contain 
> cycles, to avoid infinite loops (and stack overflow) i need 
> to keep track of the visited path. 

There is a worked example that does this in my book XSLT Programmer's
Reference (4th edition). I don't have the book with me so I can't give you a
page reference, but it should be possible to find it from the index.

Regards,

Michael Kay
http://www.saxonica.com/
http://twitter.com/michaelhkay