Windows Communication Foundation what communication protocols are used to access the service, whether security mechanisms are to be used, and the like. WCF includes predefined bindings for most common communication protocols such as SOAP over HTTP, SOAP over TCP, and SOAP over Message Queues, etc. Interaction between WCF endpoint and client is done using a SOAP envelope. SOAP envelopes are in simple XML form, which makes WCF platform-independent. When a client wants to access the service via an endpoint, it not only needs to know the contract, but it also has to adhere to the binding specified by the endpoint. Thus, both client
Directed set notions of limit used in analysis. Directed sets also give rise to direct limits in abstract algebra and (more generally) category theory. In addition to the definition above, there is an equivalent definition. A directed set is a set "A" with a preorder such that every finite subset of "A" has an upper bound. In this definition, the existence of an upper bound of the empty subset implies that "A" is nonempty. Examples of directed sets include: Directed sets are a more general concept than (join) semilattices: every join semilattice is a directed set, as the join or least upper