A __Common Component Architecture__ is a component architecture defining standards necessary for the interoperation of components developed in the context of different frameworks. To date the need for three such standards has been identified: the Interface Definition Language, an interaction model and a set of services based on this model which can be expected by every component, and should be provided by every framework, and a standardized way of retrieving information from the repository. A component in CCA is described as a ~~black box~~ with well-defined external ports. There are two types of ports in CCA specification: ~~UsesPort~~ and ~~ProvidesPort~~. Using that mechanism a computational element (i.e. a CCA component) is able to specify both provided and ~~needed~~ functionality. The process of binding two components is based on port-to-port comparison. It is also a basis for direct inter-component data transfer during execution. The idea of complementary ports makes that standard very natural for workflow computations. A platform of execution for CCA components is called __CCA Framework__. 1 Resources - {link:CCA Forum|http://www.cca-forum.org/} 1 Related - [SCIRUN] - [XCAT] 2004-09-13 12:49:23.73 2004-09-13 12:49:23.73