xsltproc -xinclude -o manual.fo  xhtml.xsl manual.xml

XPath error : Invalid expression
str:tokenize(substring-after(@url,%20%27http://live.gnome.org/Vala/Manual/%27),%27#%27)[2]
                                  ^
compilation error: file xhtml.xsl line 165 element a
Attribute 'href': Failed to compile the expression 'str:tokenize(substring-after(@url,%20%27http://live.gnome.org/Vala/Manual/%27),%27#%27)[2]' in the AVT.