Schema Extension capabilities review

[Dan Vint <dvint@acord.org>]

Not exactly a set of sample files, but here is a document that collects 
together all the extension like capabilities in the schema spec. I have 
given my review of these features and what is good and bad about them. I 
have also written up the adapter schema method and include a couple of 
samples of that. Look at the redefine section as well.

Most of the samples are out of the primer a few are based upon my ACORD 
spec. My next step will be to pull together a working sample that we can 
play with. I'll do a redefine and maybe one based upon type derivation 
substitution.

This document should help use discuss and remember the details of each of 
the methods - it was rather painful to figure out how many ways there were 
and then get the sample together in one location (unlike the primer). I now 
know why this topic has been so confusing - too many options and ways to do 
this and then they also share some of the same mechanisms (xsi:type for 
instance).

Let me know what you think.

I intend to make this a document for my organization (hence a lot of their 
details are in here as well). Please use the information, incorporate what 
you want from it in the Extensions document, but it shouldn't be published 
as is as a UBL document.

..dan

..dan

SchemaExtesnionsReview.pdf