Quality assessment of open source software isan important and active research area. One of the reasons for this permanent interest is a consequence of Internet popularity. Nowadays, programming involves looking within a large set of open source libraries and tools that may be reused when developing our software applications. In order to reuse such open source software artifacts, programmers not only need the guarantee that the reused artifact is certified, but also that independently developed

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... rtifacts can be easily combined into acoherent piece of software. In this paper we describe a domain specific language that allows programmers to describe in an abstract level how software artifacts can be combined into powerful software certification reports. This domain specific language is an important system of a web-based, open-source software certification portal. This paper introduces the embedding of such a domain specific language as a combinator library.