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Section 2.9 says: [Definition: The schema components that may be referenced by name in a stylesheet are referred to as the in-scope schema components. This set is the same throughout all the modules of a stylesheet.] The second sentence is no longer true. The set of in-scope schema components can vary from one package to another.
Proposed new definition: [Definition: The schema components that may be referenced by name in a package are referred to as the in-scope schema components. This set is the same throughout all the modules of a package.] Note: The set of in-scope schema components may vary from one package to another, but as described in [3.15], the schema components used in different packages must be consistent.
The proposal was accepted at the telcon on 2015-07-02.
The change has been applied.