„Concept maps have long provided visual languages widely used in many different disciplines and application domains. Abstractly, they are sorted graphs visually represented as nodes having a type, name and content, some of which are linked by arcs. Concretely, they are structured diagrams having discipline- and domain-specific interpretations for their user communities, and, sometimes, formally defining computer data structures. Concept maps have been used for a wide range of purposes and it would be useful to make such usage available over the World Wide Web.“
Gaines (2001) " WebMap: Concept Mapping on the Web http://www.w3.org/Conferences/WWW4/Papers/134/" on w3.org/Conferences/WWW4, 2001.