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Ontologies and Vocabularies

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Bio2RDF: Linked Data for the Life Sciences. The Product Types Ontology: Use Wikipedia pages for describing products or services with GoodRelations. Top 100 most popular RDF namespace prefixes | cygri’s notes on web data. I run prefix.cc, a website for RDF developers where anyone can register and look up the expansion URIs for namespace prefixes such as foaf, dc, qb or void. The site tracks which prefixes gets looked up most often. This allows some insight into the popularity of RDF vocabularies and datasets. This post is a snapshot of the top 100 most requested prefixes as of today. Caveats: The counts reflect what knowledgeable RDF hackers are interested in. This may or may not reflect the interests of more casual users, or what’s deployed on the web.

The og prefix for Facebook’s Open Graph protocol for example is outside of the list, at #273. That being said: The data is below, and a CSV version is available too. Sioc-project.org | Semantically-Interlinked Online Communities. SKOS Simple Knowledge Organization System - home page. SKOS is an area of work developing specifications and standards to support the use of knowledge organization systems (KOS) such as thesauri, classification schemes, subject heading lists and taxonomies within the framework of the Semantic Web ...

[read more] Alignment between SKOS and new ISO 25964 thesaurus standard (2012-12-13) ISO 25964-1, published in 2011, replaced the previous thesaurus standards ISO 2788 and ISO 5964 (both now withdrawn). Members of the Working Group responsible for ISO 25964 have gone on to consider the implications for SKOS users. They have developed a set of linkages between the elements of the ISO 25964 data model and the ones from SKOS, SKOS-XL, and MADS/RDF. This new "Correspondence between ISO 25964 and SKOS/SKOS-XL models" document can be accessed at and replaces the previous table presented in the SKOS Primer.

From Chaos, Order: SKOS Recommendation Helps Organize Knowledge (2009-08-18) HealthMash - The Best Semantic Health Search Engine and Health Knowledge Base. Ultimate Guide to Microformats: Reference and Examples. If you’re not familiar with the concept of POSH (plain old semantic HTML), the first thing to know is that producing semantic code that reflects content contextually (rather than stylistically) is a critical component of the web design process. While HTML has a whole bunch of awesome elements by which to convey meaning, a slew of purpose-built microformats (conventions) have been created to better represent the kind of content that exists on the page.

This guide discusses popular microformats that can enhance the semantics and interoperability of your website. What Are Microformats? Microformats are pretty interesting if you give them a chance. While they aren’t a component of the W3C HTML spec, they do offer a valuable and useful set of naming conventions (using class, id, rel and rev attribute values) that identify points of interest on the page, such as calendar events, links to the content’s license agreement, and even quirky things such as cooking recipes.

Drawbacks of Microformats fn. Science-Metrix - Évaluation S&T Evaluation. About WordNet - WordNet - About WordNet. WordNet is supported by the National Science Foundation under Grant Number 0855157. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the creators of WordNet and do not necessarily reflect the views of the National Science Foundation. About WordNet WordNet® is a large lexical database of English. Nouns, verbs, adjectives and adverbs are grouped into sets of cognitive synonyms (synsets), each expressing a distinct concept. Synsets are interlinked by means of conceptual-semantic and lexical relations. The resulting network of meaningfully related words and concepts can be navigated with the browser.

WordNet superficially resembles a thesaurus, in that it groups words together based on their meanings. Structure The main relation among words in WordNet is synonymy, as between the words shut and close or car and automobile. Relations Meronymy, the part-whole relation holds between synsets like {chair} and {back, backrest}, {seat} and {leg}. Ontology Design Patterns . org (ODP) - Odp.