Whats the difference between semantic search engine,web directory and search engine?
****Semantic Web search engines index RDF data stored on the Web and provide an interface to search through the crawled data. Examples of semantic web search engines include: * CK Lingo Novorum Consulting Inc. * Semantic Web Search Engine (SWSE) Developed by DERI Ireland. * Sindice Developed by DERI Ireland. * Watson Developed by KMi, UK. * Yahoo! Microsearch * Falcons Developed by IWS China. * Semantic Web Search Developed by Intellidimension Inc. * Zitgist Search * Kartoo * Swoogle Developed by the Ebiquity Group of UMBC, USA. * Semantic Email Search Developed by IBM Research * Biolab Experiment Assistant Developed by Biovista, Inc. * K-Search Developed by Knowledge Now Ltd ****A web directory or link directory is a directory on the World Wide Web. It specializes in linking to other web sites and categorizing those links. A web directory is not a search engine and does not display lists of web pages based on keywords; instead, it lists web sites by category and subcategory. The categ