Section 5.2 of the Structures spec defines three distinct modes of
validation (or: three distinct ways of starting a validation 
episode), but does not provide terms for them.  

It would be convenient if names for the different forms of
validation were defined; this would make it easier for users and
other specs to specify, when appropriate, that in a particular
context a particular form of validation should or must be used.

By analogy with the terms proposed for XML Schema 1.1 in
http://www.w3.org/XML/Group/2004/06/xmlschema-1/structures.rq144.200502.html#validation_outcome
(member-only link), I propose that XML Schema 1.0 be modified
to provide the terms "type-driven validation", "element-driven 
validation", and "lax wildcard validation" for the three
startup methods now defined in section 5.2.