> The code doesn't have to be part of a library, it could just be
> code that manipulates documents coming in from external sources.
> The fact is that the combination of xsi:schemaLocation and
> xsi:type make it very likely that a type aware application will
> come across derived types in instance documents unless these
> attributes are specifically mandated against.
Understood. I had neglected to factor in the effect of schemaLocation
attributes.
So depending on the service offered, it may be useful
to programatically ignore "helpful" schemaLocation hints and rely
solely on a local cache. Section 4.3.2 of
the XML Schema Part 1 http://www.w3.org/TR/xmlschema-1/#schema-loc
leaves the door open for products to allow this.
Thanks for your patience.
Michael.
