> <!NOTATION xml PUBLIC "someplace"> <!-- value for 'someplace'? -->
Back towards the end of Dec 2004 I spent some time surfing for this
information, and found no official information. I did find two FPIs
"ISO 8879//NOTATION Extensible Markup Language (XML) 1.0//EN" 
"-//W3C//NOTATION Extensible Markup Language//EN" 
Otherwise your declarations are correct, although there is a lot to
be said for using Sebastian's url= attribute instead. (In either
case, it is reasonable to presume there will be software to automate
a conversion to whatever P5 uses.)
> (note that in the printed TEI P4 guidelines, sec. 14.2.3 at the top
> of p. 366, there's a sample declaration of a 'dunciad' element
> lacking the NDATA portion--this is an error, no? My parser
> complains that "xml" is not an unparsed element in this case.)
I think I'd call that an error. Since almost every other example in
all of P4 is XML, it makes little sense that this one example would
be in SGML. I will add this as an official report of an error, and
unless someone objects, hope to fix it within a week or two.
> 2. Then would this be the proper form of a reference to a particular
> note in that volume, assuming that note has an id=V1P374n2 ?
><note>See above <xref doc="vol1" from="id (V1P374n2)">1:374 n2.</note>
Not without an end-tag for that <xref>! :-)
Otherwise I think the reference is correct.