This attribute specifies mapping between the NameID Format attribute and a user profile attribute. If the defined Name ID format is used in protocol, the profile attribute value will be used as NameID value for the format in the Subject. The syntax of each entry is:
NameID Format=User profile attribute
For example:
urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress=mail
To add new NameID format, the NameID Value Map attribute needs to be updated with a corresponding entry. The exceptions are persistent, transient and unspecified. For persistent and transient, the NameID value will be generated randomly. For this attribute, unspecified is optional. If it is specified, the NameID value will be the value of the user profile attribute. If it is not specified, an random number will be generated.