version information contained in in taxon member of Inverse property of inDataset. It permits to navigate to the clusters included in a particular dataset. Has cluster Property that permits to define the membership of a cluster of homologs or a sequence unit to a clusters of homologs Has homologous It permits to link a cluster with its data source Has source Property that associates a cluster of homologs with the taxonomic range at which it has been calculated Has taxonomic range Inverse of has homologous. This property permits to find the cluster in which a cluster or sequence unit is included. Is homologous member Property that provides the dataset associated with a gene tree node In dataset description identifier Property that stores the name of the taxonomic range at which a given cluster of homologs has been calculated tax range This property links a cluster of homologs with its taxonomic range. tax range id version Taxon Species Tree with a root node, which is the common ancestor to all the nodes in the tree Evolutionary event Evolutionary event that consists on the duplication of a gene Evolutionary event related with the evolution of a gene in different species Basic unit of graphs and trees A node of a tree whose leaf nodes are sequence units and whose internal nodes are clusters of homologs Gene tree node A tree whose content is the result of the application of hierarchical clustering to a dataset Hierarchical clustering tree A tree whose leaf nodes correspond to genes Hierarchical gene tree Set of homologous sequences Cluster of homologs Set of homologous sequences derived from a speciation event. Cluster of orthologs A resource that provides information about orthology Orthology dataset Set of homologous sequences derived from a duplication event Cluster of paralogs protein or DNA sequence as a unit of comparison Sequence unit A region of the sequence of the gene Subgene The taxonomic range represents the taxon at which a group of sequences are considered members of the same cluster of orthologs/paralogs Taxonomic range Collection of data Dataset The source of orthology information (e.g., database) Resource