FeedHub. Tutorials. OWL Web Ontology Language Guide. W3C Recommendation 10 February 2004 New Version Available: OWL 2 (Document Status Update, 12 November 2009) The OWL Working Group has produced a W3C Recommendation for a new version of OWL which adds features to this 2004 version, while remaining compatible.
Please see OWL 2 Document Overview for an introduction to OWL 2 and a guide to the OWL 2 document set. This version: Latest version: Previous version: Editors: Michael K. Chris Welty, IBM Research, Deborah L. Please refer to the errata for this document, which may include some normative corrections. Calais. Resource Description Framework. Faceted navigation for document discovery. Better search with faceted navigation Text search is one of the most important ways that users of enterprise content can find the documents they need.
Unfortunately, there are a number of reasons why enterprise text search systems often work less well than search of the public Internet (Enterprise Search: Tough Stuff, Rajat Mukherjee and Jianchang Mao. ACM Queue vol. 2, no. 2, April 2004). The main reason is that most enterprise content isn't cross-linked, so the search system doesn't have the page rank information that identifies "good" pages on a topic. On the other hand, Internet search doesn't make much, or any, use of metadata because most Internet content has minimal or no metadata. Thus there is an opportunity to improve search within enterprises by using metadata. RDF Primer. The Resource Description Framework (RDF) is a language for representing information about resources in the World Wide Web.
This Primer is designed to provide the reader with the basic knowledge required to effectively use RDF. It introduces the basic concepts of RDF and describes its XML syntax. It describes how to define RDF vocabularies using the RDF Vocabulary Description Language, and gives an overview of some deployed RDF applications. SPARQL. SPARQL (pronounced "sparkle", a recursive acronym for SPARQL Protocol and RDF Query Language) is an RDF query language, that is, a semantic query language for databases, able to retrieve and manipulate data stored in Resource Description Framework format. It was made a standard by the RDF Data Access Working Group (DAWG) of the World Wide Web Consortium, and is recognized as one of the key technologies of the semantic web.
On 15 January 2008, SPARQL 1.0 became an official W3C Recommendation, and SPARQL 1.1 in March, 2013. SPARQL allows for a query to consist of triple patterns, conjunctions, disjunctions, and optional patterns. Implementations for multiple programming languages exist. "SPARQL will make a huge difference" making the web machine-readable according to Sir Tim Berners-Lee in a May 2006 interview. Advantages The example below demonstrates a simple query that leverages the ontology definition "foaf", often called the "friend-of-a-friend" ontology. Argotic Syndication Framework. FOAF Vocabulary Specification. Classes Class: foaf:Agent Agent - An agent (eg. person, group, software or physical artifact).
Swoogle Semantic Web Search Engine. Owl ontologies. Services. The Matchmaker is also a web service that helps make connections between service requesters and service providers.
The Matchmaker serves as a "yellow pages" of service capabilities. LibraryThing. LT members who’ve been around for a year or so may remember our partnership with Books Matter, an organization dedicated to providing books to needy schools in Ghana.
I caught up with Keith Goddard—founder of Books Matter—this week, who was kind enough to update me on their latest projects! Interested in donating to Books Matter? How to Make a Faceted Classification and Put It On the Web. Update February 2011: This has been translated into Dutch: Hoe maak je een facetclassificatie en hoe plaats je haar op het web?
Many thanks to Janette Shew and the Information Architecture Institute's Translations Initiative for doing this. Also, How to Reuse a Faceted Classification and Put It On the Semantic Web, by Bene Rodriguez-Castro, Hugh Glaser and Les Carr, takes my example of dishwashing detergents and extends it into ontologies and RDF. Update February 2007: IA Voice has used this paper as the basis for a series of four podcast episodes! OpenCalais. 180 Del.icio.us Tools and Resources. Feb Filed Under Service | Comments Off Social bookmarking was one of the earliest trends out on the social web, and del.icio.us quickly took the lead.
Today, we outline over 180 of the best tools and resources to get the most out of the number one social bookmarking site. Web browser add-ons and Bookmarklets Randomizer button- A great way to find sites whch you may never have discovered otherwise, the button takes you to a random, recently bookmarked site. del.icio.us Toobar- A Firefox extension allowing you to bookmark and tag sites from a toolbar in the browser. del.icio.us Firefox Extension- The official del.icio.us Firefox extension does a great job of integrating your favorite bookmarks into your favorite web browser. Quicker Tag Bookmarklet- Add to your Firefox toolbar to quickly tag bookmarks with specific keywords. SIMILE Project.