100%(1)1 out of 1 people found this document helpful
This preview shows page 105 - 110 out of 160 pages.
Expert Systems Benefits•Consistent•Unbiased•Efficient: Ability to distribute scarce expertise–E.g., Debbi Fields•Faster than some experts•Can integrate best thinking of many experts•Handles more complexity than humans or traditional software programs•Can handle some ambiguity
Expert Systems Limitations•Limitations–Work best with small, focused areas of expertise–Work only for problems/decisions that can be articulated and specified (It’s software!)–Costly to develop, maintain, and update with new knowledge•Suitable problems–Narrow domain–Well-defined problem–Expert exists & is willing to let you codify his/her knowledge
The Semantic Web**from Wikipedia•The Semantic Web is a collaborative movement led by the international standards body, the World Wide Web Consortium (W3C). The standard promotes common data formats on the World Wide Web. By encouraging the inclusion of semantic content in web pages, the Semantic Web aims at converting the current web dominated by unstructured and semi-structured documents into a "web of data". •According to the W3C, "The Semantic Web provides a common framework that allows data to be shared and reused across application, enterprise, and community boundaries.“…. to represent semantically structured knowledge. It extends the network of hyperlinked human-readable web pages by inserting machine-readable metadata about pages and how they are related to each other, enabling automated agents to access the Web more intelligently and perform tasks on behalf of users.•The term was coined by Tim Berners-Lee, the inventor of the World Wide Web and director of the World Wide Web Consortium ("W3C"), which oversees the development of proposed Semantic Web standards. He defines the Semantic Web as "a web of data that can be processed directly and indirectly by machines.“…. so machines can perform more of the tedious work involved in finding, combining, and acting upon information on the web•While its critics have questioned its feasibility, proponents argue that applications in industry, biology and human sciences research have already proven the validity of the original concept. Scholars have explored the social potential of the semantic web in the business and health sectors, and for social networking.
Today’s Web vs. Semantic WebWeb 2.0•HTML – hypertext mark-up language•Example: <item>blog</item>•identifies documentWeb 3.0•XML – extensible mark-up language plus data oriented – RDF (resource description framework) and OWL (web ontology language)•Example:<itemrdf:about="m/semantic-web-a-meaningful-search-engine/">blog</item>•identifies specific content within a document
The Semantic Web Stack**from WikipediaResource Description Framework (RDF), a general method for describing informationRDF Schema (RDFS)Simple Knowledge Organization System (SKOS)SPARQL, an RDF query languageNotation3 (N3), designed with