A parameter's effective default comes from the node type, then the schema
The rule
Normative: this is the rule
- A parameter's effective default is the node type's recorded default where that default is non-null, otherwise the processor's schema default, otherwise null.
- A node-type default recorded as null is not distinguished from one that was never recorded, so it does not suppress the schema default.
Rule identifiers are permanent and are never renumbered. Each implementation publishes its own standing against these rules; this specification does not.spec 1.0-draft · CFG-3 · changed in spec 1.0