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- Scope: This is the scope of actions that are available to be performed.
- Cardinality: This pertains to the number of participants involved in the use case. For example, how many Hosts and AMs are involved within the use case.
- Nature of host: This dimension pertains to the host being either a host only, or whether it also takes-on the role of a Requestor in some sub-scenario of the use case.
- Dynamism vs Static-ness: This dimension pertains to the Host-AM interaction. It attempts to capture the degree of interactions required between a Host and AM in satisfying the use case scenario. This can range from all participants having been pre-configured with information about each other (very static), to the situation in which the AM and Host must communicate or interact every time A Requester submits a request.
- Resource discovery: This dimension addresses the aspect of the degree to which a new Requestor must learn about available resources.
- Nature of access to protected resource: This dimension is related to the Scopes dimension and addresses the means used to access protected resources at a Host, such as whether (a) an API end-point is identified and used, or (b) a content-oriented approach (such as URLs) is usedA description of the sorts of protected resources at hosts in this scenario, and the scope values that might be applicable, ideally with real-life supporting evidence. Protected resources appear to fall on a continuum from API endpoint (such as status updates) to content-oriented (such as photos), and further, typical actions on them may usefully be classified in terms of how RESTful they are. In the location services use-case (see below), protection of a location service (a set of one or more API endpoints) might involve scope values such as "write location data", "read precise location data", and "read location data at a city level".
- Person-to-self: This dimension is closely related to the Nature of Host dimension, and may only occur is rare use cases. It pertains to the situation in which the same entity (user) is required to connect separately to the Host in order to explicitly perform some task under a different role. Thus, although the Host may identify the entity (user) differently on each of these connections, the situation is such that only the same entity (user) can complete this task. Hence this dimension is referred to as person to herself/himself.
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