The Ontology contains a subset of about 400 terms highly relevant to crop wild relatives. Terms with high relevance to CWR domain are grouped into themes, roughly corresponding to AGROVOC (top level) categories, or indicatives of the thematic sources from which the terms were collected (biological, geographical on-line dictionaries etc), with an attempt to balance the number of terms between the groups. For the import into the ontology structure the themes were converted to namespaces in order to preserve the grouping and allow manipulation within ontology client programs on terms based on namespace grouping. Before the import the namespaces were slightly modified and adapted to some other existing ontologies. The ontology is available as OWL Full.