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Service-component architecture (SCA) is a group of specifications intended for the development of applications based on service-oriented architecture (SOA), which defines how computing entities interact to perform work for each other. Originally published in November 2005, SCA is based on the notion that all the functions in an enterprise should exist in the form of services that are combined into composites to address specific business requirements.
SCA encompasses diverse technologies, programming languages, frameworks and platforms for Web service components and for the methods used to connect them. SCA can be broken down into four major parts or models:
- The assembly model, which defines how components are combined, linked and packaged as services independent of the programming language.
- The implementation model, which defines how services are packaged and accessed for specific programming languages.
- The policy model, which defines service policies independent of the programming code.
- The bindings model, which defines how components are accessed independent of the programming code.
When properly implemented, SCA can help an enterprise to minimize the workload on its developers, shorten learning curves, facilitate reuse of services and update policies without having to modify the programming. SCA also facilitates control over access methods and the implementation of security-related countermeasures.
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