1.1 What is Knowledge?•There are many definitions of ‘knowledge’. Some have broad coverage with vague sociological definitions while others are very restrictive.•Note that dictionary definitions may not be completely compatible with the definitions. 1.Data ÆInformation (processed data) ÆKnowledge (evolution / know-how based on our experience, jurisdiction, judgment; a result of learning)2.Knowledge is part of information. Information is a “class” that includes data and knowledge.•Dataare facts about something. For example, this car is red; that building has five stories; the temperature is 20°C; his name is Paul, etc. These are attribute-value pairs.2
1.1 What is Knowledge?•(Definition 2) Knowledge is created by expressing relationships between data.Following are examples of possible links.–classification(this car is a kind of vehicle)–compositional(this building is part of a school)–empirical(the exchange rate is HKD $0.129/USD$)–physical principles (F=m·a)•Knowledge can also be–semantic(Paul is the name of a boy)–heuristic(very long bridges are suspension bridges)–causal(if the temperature is 100°C then water boils)3
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