YES - essential
>- processing instructions are required for most proposed XML-related
> standards, including XSL and architectural forms;
It seems likely that they will also be used in namespace declarations.
Note, however that there is no proposal for the internal representation of
PIs other than the two components mentioned by DavidM. I support returning
both.
P.
Peter Murray-Rust, Director Virtual School of Molecular Sciences, domestic
net connection
VSMS http://www.nottingham.ac.uk/vsms, Virtual Hyperglossary
http://www.venus.co.uk/vhg