The Prescoped attribute definition turns a simple string-valued attribute into a two-part scoped attribute by splitting the input attribute into three parts, the value, a (fixed) delimiter, and the scope/suffix. Such attributes can be used as input to the SAML2ScopedStringEncoder and SAML1ScopedStringAttributeEncoder attribute encoders.
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Schema Name and Location
This xsi:type is defined by in the urn:mace:shibboleth:2.0:resolver schema 3 namespace 3.3, the schema for which can be located at http://shibboleth.net/schema/idp/shibboleth-attribute-resolver.xsd.
Prior to V3.3 supplied plugins were defined by a schema type (xsi:type) in the urn:mace:shibboleth:2.0:resolver:ad namespace, the schema for which is located at http://shibboleth.net/schema/idp/shibboleth-attribute-resolver-ad.xsd. This is still supported, but every element or type in the urn:mace:shibboleth:2.0:resolver:ad old namespace has an equivalently named (but not necessarily identical) version in the urn:mace:shibboleth:2.0:resolver namespace. The use of the urn:mace:shibboleth:2.0:resolver namespace also allows a relaxation of the ordering requirements of child elements to reduce strictness.
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