Scope

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When a customization value is defined in a binding declaration, it is associated with a scope. A scope of a customization value is the set of schema elements to which it applies.

The defined scopes are as follows:

• global scope: A customization value defined in <bindings> has global scope. A global scope covers all the schema elements in the source schema and (recursively) any schemas that are included or imported by the source schema.
• schema scope: A customization value defined in <schemaBindings> has schema scope. A schema scope covers all the schema elements in the target namespace of a schema.
• node scope: A customization value defined in <nodeBindings> has node scope. A node scope covers all schema elements that reference the type definition, the global declaration or the local declaration.

A customization value defined in one scope is inherited for use in a binding declaration covered by another scope as shown by the following inheritance hierarchy:

• A schema element in schema scope inherits a customization value defined in global scope.
• A schema element in node scope inherits a customization value defined in schema or global scope.

Likewise, a customization value defined in one scope can override a customization value inherited from another scope as shown below:

• A value in schema scope overrides a value inherited from global scope.
• A value in node scope overrides a value inherited from schema scope or global scope.