The OmniClass Construction Classification System (known as OmniClass™ or OCCS) is a classification system for the construction industry. OmniClass is useful for many applications, from organizing library materials, product literature, and project information, to providing a classification structure for electronic databases. It incorporates other extant systems currently in use as the basis of many of its Tables – MasterFormat™ for work results, UniFormat for elements, and EPIC (Electronic Product Information Cooperation) for structuring products.
The cladistic method (or cladism) has emerged since the 1960s.  In 1958, Julian Huxley used the term clade.  Later, in 1960, Cain and Harrison introduced the term cladistic.  The salient feature is arranging taxa in a hierarchical evolutionary tree , ignoring ranks.  A taxon is called monophyletic, if it includes all the descendants of an ancestral form.   Groups that have descendant groups removed from them (. dinosaurs , with birds as offspring group) are termed paraphyletic ,  while groups representing more than one branch from the tree of life are called polyphyletic .   The International Code of Phylogenetic Nomenclature or PhyloCode is intended to regulate the formal naming of clades .   Linnaean ranks will be optional under the PhyloCode , which is intended to coexist with the current, rank-based codes.