...
Schema Name
The ValueRegex type is defined by defined in the urn:mace:shibboleth:2.0:afp namespace, which can be located at http://shibboleth.net/schema/idp/shibboleth-afp.xsd
The deprecated basic:AttributeValueRegex type was defined in the urn:mace:shibboleth:shibboleth:2.0:afp:basic namespace, the schema for which can be found at http://shibboleth.net/schema/idp/shibboleth-afp-mf-basic.xsd
Attributes
Two attributes may be specified:
...