Terms negotiation forms a special sub-category of UMA scenarios. Requirement R0b says that UMA must "Allow an individual to select policies and enforceable contract terms that govern access, as well as data storage, further usage, and further sharing on the part of requesting services." As discussed in the issues section How Terms Can Be Met, while policies can be applied unilaterally, terms represent some set of requirements a requester must meet, where success means that an implicit or explicit agreement has been forged. Thus, the expressing and handling of terms have an impact on the UMA protocol in a way policies do not.
This section describes scenarios and specific use cases for terms negotiation.