# KEHOME/knowledge/theory/KRdesign/knitchit.html # 1999/5/4 # new syntax Sep/29/2002 knowledge unit ============== A knowledge unit (knit) is a set of statements organized as an entity-relation concept-hierarchy and identified by a view name. at view=tabula_rasa identifies a new knit, ready to be filled with specific knowledge. The top-level concepts of tabula_rasa include the axiomatic concepts (e.g., entity, relation, attribute, action, identify) which are used to specify all knowledge. The bottom-level concepts of any knit include the axiomatic percepts (integrated sense data) which are the internal measurement of external reality. The intermediate-level non-axiomatic concepts are chosen by each person, according to his/her purpose. The two fundamental purposes are unit-economy (minimize the size of the knowledge representation) and selective focus (on particular characteristics of entities). change unit =========== A change unit (chit) is a set of action/event statements identified by event names and the space-time at which they occur. These statements: at space=s,time=t,view=v entity do action=e od aobject done e changes eobject \ from attribute=initial \ to attribute=final identify a new chit with event e. s identifies where e occurs. t identifies when e occurs.
General References