[Zope3-dev] Add function for schema validation in zope.schema

[Christian Zagrodnick]

Hi,

zope.schema defines how a schema can be validated, defines errors and 
provides a way to validate single fields.

I think we should add a function to validate a given schema on a given 
class. This should include constraints and invariants:

validateSchema(IMySchema, myobject)  [or alike]

I'm not sure about return values or exceptions. There are different use cases:

1. Is the object valid? -> True/False
2. What's wrong with the object -> {attribute/field-name: what's 
wrong}, what's wrong with invariants.

Comments?
-- 
Christian Zagrodnick

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