Thanks Carl,
I think we would be flattered to think that XSchema was a 'standard' :-).
I appreciate the emphasis on documenting semantics (and behavior). This is
an area where I have often suggested that we need more help from the XML
specs. However in this case I suspect there is no behavior involved with
this attribute - it's merely a guide as to whether an author would be
advised to use a particular element as a Root. In many domains this will
come down to ontological perceptions - for example, I would hesitate to
recommend that authors of CML documents should take *my* choices of Root as
the field is so new. In this case I suspect it is a rather fuzzy guide to
newcomers saying - "Suggest you start here" or "suggest you don't". I
suppose it is conceivable that a machine could provide useful navigation of
the XSchema starting at "recommended" and not starting at "unlikely".
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