mozilla-services/cornice — pull request #87 by mfelsche (2012-11-14 17:37:52+00:00)
Title: support for colander inheritance

Taking Schema.nodes as Schema-Attributes for validation does not work with Schema Inheritance.
You have to take the children of a Schema-Instance to get the correct nodes, as overriding SchemaNode-attributes just adds them to Schema.nodes, on instantiation they are filtered.