Thanks. I wasn't aware of this. We need something like it. It does, of
course, rely on building a significant registry for FPIs. As far as I
remember from previous discussions very FPIs are registered at present, and
the mechanism is not widely known. If this mechanism is to become popular
for XML - before the WWW gets swamped with untyped documents without
meaningful FPIs - there needs to be a lot of effort to publicise and
implement it.
>
>For example, ISOGEN has defined for its own use a base architecture from
>which a variety of specific document types can be derived. I can invoke
>the use of this architecture like so:
>
><?XML 1.0 ?>
><?IS10744:arch
> name="ISOBase"
> public-id="+//IDN isogen.com//NOTATION ISOGEN Base Architecture//EN"
> dtd-system-id="http://www.isogen.com/ISOBase/isobase.mdt"
>?>
As I understand it, these PIs are *permitted* in XML (any PI is permitted)
but they are given no special importance and implementers are not required
to support them. So XML - as it stands today - has no mechanism for
requiring this to be implemented or interpreted.
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