XML: is there an "xml-include"

[Gregor Hagedorn]

If character are defined with an id (numeric or character) in one
file, and the item descriptions use these ids through idref or
through xml-schema keyref means:

How can a validating parser validate the schema, including keyrefs,
without having to include the entire character definition in each of
1000s of taxon description xml files? Can the ids for idref/keyref be
declared to be in a separate file?

I could not find a standard xml-include command. I know there is one
defined for dtds, but that is all I could find.

Can the xml experts help?

Gregor

PS I will post minutes of the TDWG meeting within the next days
----------------------------------------------------------
Gregor Hagedorn (G.Hagedorn at bba.de)
Institute for Plant Virology, Microbiology, and Biosafety
Federal Research Center for Agriculture and Forestry (BBA)
Koenigin-Luise-Str. 19          Tel: +49-30-8304-2220
14195 Berlin, Germany           Fax: +49-30-8304-2203

Often wrong but never in doubt!