The oBIX lobby is the root of a server’s oBIX object tree. The lobby has certain semantics associated with it, such as how to create watches and batch operations. Therefore, it is important that the URI given the oBIX client is that of the lobby, and not a sub-object.

A Universal Resource Identifier is the location of an Internet resource (for example, web-page, ftp service, and so on). This term is a more general term for the commonly used Uniform Resource Location or URI.

And watches. oBIX watches are subscriptions. Watches allow a client to maintain a real-time cache for the current state of one or more objects. They are also used to access an event stream from a feed in the case of alarms.