Figure LR.66 - Interaction between Resource and Place

In the SID, different types of Place have different types of semantics associated with them. For example, a Wireless Access Point has an associated coverage area. Only applications within that coverage area can use the services associated with the Wireless Access Point. As another example, subscribers will access different POPs (Points of Presence, the Service Provider term for an access network) as they travel nationally and internationally. Services may vary, and additional peering relationships may come into effect. A simple starting model is shown in the Figure below.<br/>Clearly, policies can be used to define the semantics of a particular Place.<br/>