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--- studenti:mihita_cvitanovic:knowledge_representation [2012/05/30 21:07]
mcvitanovic [Knowledge representation definition]
+++ studenti:mihita_cvitanovic:knowledge_representation [2023/06/19 16:21] (trenutno)
@@ Redak 3: / Redak 3: @@
 ===== About knowledge representation =====
-- knowledge is implicit, i.e. hidden inside our minds
+Knowledge is **stored in implicit form**, i.e. it is hidden inside our minds. This often creates problems when we want to share our knowledge with other people. We need to find a way to present them our knowledge, which means that we need **to make the knowledge explicit**. Explicit form of knowledge enables us to share the information less ambiguously. This became extremely important when computers started to be used for **knowledge transfer and sharing**.
-- problem- how to share it with others?
+Knowledge representation is an interdisciplinary field based on mathematics, philosophy and cognitive science [2].
-- we need to make it explicit. i.e. formalized and, thus, available to everybody
-- explicit form of knowledge enables us to share the information less ambiguously which became extremely important when computers started to be used for knowledge transfer and sharing
+Knowledge representation is today mainly considered as a field in **artificial intelligence** [3]. However, other disciplines, such as **education psychology**, also do research on knowledge representation.
-- knowledge representation is an interdisciplinary field based on mathematics, philosophy and cognitive science.
 ===== Knowledge representation definition =====
-“Knowledge representation is the application of logic and ontology to the task of constructing computable models for some domain” (J.F. Sowa)
+“Knowledge representation is the application of **logic and ontology** to the task of constructing **computable models** for some domain” (J.F. Sowa)
 Explanation:
-**Logic** provides the formal structure and rules of inference.
+  * **Logic** provides the formal structure and rules of inference.
-**Ontologies** are viewed as a shared and common understanding of a domain that can be communicated between people and heterogeneous application systems.
+  * **Ontologies** are viewed as a shared and common understanding of a domain that can be communicated between people and heterogeneous application systems.
-Logic and ontology together provide the formalisation mechanisms required to make expressive models easily sharable and computer aware. Thanks to computational resources, great quantities of knowledge expressed this way can be automated.
+  * **Logic and ontology** together provide the formalisation mechanisms required to make expressive models easily sharable and computer aware. Thanks to computational resources, great quantities of knowledge expressed this way can be automated.
 ===== Roles of knowledge representation =====
@@ Redak 28: / Redak 27: @@
   - A knowledge representation is a **medium of human expression**: a good knowledge representation language should facilitate communication between the knowledge engineers who manage knowledge tools and the domain experts who understand the application domain. Domain experts should be able to read and verify the domain definitions and rules written by knowledge engineers.
 ===== Knowledge representation technologies =====
+Knowledge representation is based on logic, ontology and computation. These components make different implementations of knowledge representation which can be classified as follows:
   * [[studenti:mihita_cvitanovic:knowledge_representation_technologies:logic_based_representation|Logic-based representation]]
@@ Redak 36: / Redak 37: @@
   - [[http://groups.csail.mit.edu/medg/ftp/psz/k-rep.html|R. Davis, H. Shrobe, and P. Szolovits. What is a Knowledge Representation? AI Magazine, 14(1):17-33, 1993]]. Retrieved March 17, 2012.
   - [[http://rhizomik.net/html/~roberto/thesis/html/KnowledgeRepresentation.html|Roberto García. A Semantic Web Approach to Digital Rights Management]]. Retreived April 28, 2012.
+  - [[http://www-formal.stanford.edu/jmc/whatisai/whatisai.html|John McCarthy. What is Artificial Intelligence]]. Retreived April 28, 2012.
 ===== Read more =====
   - [[http://www.jfsowa.com/krbook/index.html|J.F. Sowa. "Knowledge Representation. Logical, philosophical and computational foundations".Brooks Cole Publishing Co., 2000]]
+  - Ronald J. Brachman, Hector J. Levesque. "Readings in knowledge representation". M. Kaufmann Publishers, 1985
+  - [[http://www.makhfi.com/KCM_intro.htm|Pejman Makhfi. Introduction to Knowledge Modeling.]]

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