Within a schema, global type names (simpleType and complexType share one symbol
space), global element names, global attribute names, named model-group names,
and named attribute-group names must each be unique, and identity-constraint
names must be unique across the document. A duplicate was accepted, with the
later definition silently overwriting the earlier one.
Only the document's own globals are examined (xs:redefine children and unloaded
included documents are not direct globals), so a redefinition is not mistaken
for a clash; the symbol spaces are kept separate, so a type and an element may
share a name.
XSTS: invalid schemas accepted 909 to 891 (-18); valid schemas rejected held at
72; instance buckets unchanged.
Mihaela Mihaljevic
5ebf3b861c