Knowledge representation may be called by different names such as
organizing, customizing or codifying knowledge [Schreiber 99]. The objective of this
process is representing the knowledge to suit the knowledge selection. Comparing this
process with SECI model, knowledge representation is transforming tacit knowledge
into explicit (codified) knowledge which is equivalent to the externalization mode in
the SECI model. In the past, representing the knowledge was done by writing,
drawing or coding the knowledge into a codified format (e.g. procedure). Nowadays,
the emergence of multimedia and information technology means that knowledge can be represented in various forms and formats such as sound, picture, video, concept
map, 3-D model, database, etc. These technologies make it possible for experts to
articulate their tacit knowledge into explicit knowledge, which was nearly impossible
in the past.