==== mapping concepts and their relations. ., ====
  * overview/survey > http://www.observetory.com/conceptmappingvs1.htm
  * the theory & construction of concept maps > http://cmap.ihmc.us/Publications/ResearchPapers/TheoryCmaps/TheoryUnderlyingConceptMaps.htm
  * see also; [[Information Visualisation]]

==== software ====
  * CMapTools -> http://cmap.ihmc.us/
  * http://en.wikipedia.org/wiki/List_of_concept_mapping_software

==== other ====
  * related [[graph drawing]]