3. The computer-implemented method of claim 2 , wherein the functional model comprising a hierarchical functional attribute corresponding to the meta tag, wherein a value of the hierarchal functional attribute in a coverage task comprises an identifier of one or more tags which caused the test case to possess the meta tag.
2. The computer-implemented method of claim 1 further comprising: wherein said defining the one or more tags comprises defining a meta tag, wherein possession of the meta tag is dependent on possessions of tags; applying queries corresponding to the meta tag on the set of test cases to determine possession of the meta tag.