- It can range from being a Tacit Knowledge to being a Explicit Knowledge.
- It can range from being a Procedural Knowledge(Operational Knowledge) to being a Declarative Knowledge.
- It can range from being A Priori Knowledge to being a A Posteriori Knowledge.
- It can range from being Speculative Knowledge to being a Scientific Knowledge.
- It can range from being a Domain-Specific Knowledge to being a Domain-Independent Knowledge.
- It can be discovered with a Knowledge Discovery Task.
- It can be acquired by the Knowledge Acquisition Task.
- It can be represented in a Knowledge Base (such as an Ontology).
- It is the focus of Epistemology.
- See: Concept, Knowledge Base, Entity, Description, Skills, Experience, Education, Perception, Discovery (Observation), Learning, Philosophy, Epistemology.
- (Wikipedia, 2014) ⇒ http://en.wikipedia.org/wiki/knowledge Retrieved:2014-6-16.
- Knowledge is a familiarity, awareness or understanding of someone or something, such as facts, information, descriptions, or skills, which is acquired through experience or education by perceiving, discovering, or learning. Knowledge can refer to a theoretical or practical understanding of a subject. It can be implicit (as with practical skill or expertise) or explicit (as with the theoretical understanding of a subject); it can be more or less formal or systematic.  In philosophy, the study of knowledge is called epistemology; the philosopher Plato famously defined knowledge as “justified true belief”. However, no single definition of knowledge exists, though there are numerous theories to explain it. Knowledge acquisition involves complex cognitive processes: perception, communication, association and reasoning; while knowledge is also said to be related to the capacity of acknowledgment in human beings. 
- Stanley Cavell, "Knowing and Acknowledging", Must We Mean What We Say? (Cambridge University Press, 2002), 238–266.
- (WordNet, 2009) ⇒ http://wordnetweb.princeton.edu/perl/webwn?s=knowledge
- S: (n) cognition, knowledge, noesis (the psychological result of perception and learning and reasoning)