Custom attribute resolver IdPv4

[Cantor, Scott]

You can't define custom elements, only custom schema types (i.e. xsi:type designations).

All of the standard ones are also types, not elements. You don't see <ScopedAttributeDefinition>, only <AttributeDefinition xsi:type="Scoped">

You're likely pretty close, except for adjusting the schema design and what you're actually registering as a Spring parser.

-- Scott