“…Wille 1 introduced a hierarchical order for formal concepts of a formal context and proved that the set of all formal concepts together with the hierarchical order forms a complete lattice, called the concept lattice of the formal context. In FCA, concept lattices are the basic tool used to analyze relational databases and have been applied to a variety of areas such as machine learning 9,10,11,12,13,14 , knowledge discovery 15,16,17,18,19 , software engineering 20 and other aspects 21,22,23 .…”