Learn, Develop, Participate - Neo4j, the Graph Database. Semantic University. Semantic University is the largest and most accessible source of educational material relating to semantics and Semantic Web technologies. It includes: Lessons suitable to those brand new to the space. Comparisons, both high-level and in-depth, with related technologies, such as SQL, NoSQL and Big Data. Interactive, hands on tutorials. There's much more, too—learn more about Semantic University. Semantic University content is split into two sections, each with several tracks. Every lesson comes with its own Forum for further discussion. Semanticweb.com - The Voice of Semantic Web Business. Web Ontology Language OWL / W3C Semantic Web Activity. DCMI Home: Dublin Core® Metadata Initiative (DCMI) About rich snippets and structured data - Webmaster Tools Help.
Rich snippets (microdata, microformats, RDFa, and Data Highlighter) Snippets—the few lines of text that appear under every search result—are designed to give users a sense for what’s on the page and why it’s relevant to their query. If Google understands the content on your pages, we can create rich snippets—detailed information intended to help users with specific queries. For example, the snippet for a restaurant might show the average review and price range; the snippet for a recipe page might show the total preparation time, a photo, and the recipe’s review rating; and the snippet for a music album could list songs along with a link to play each song. These rich snippets help users recognize when your site is relevant to their search, and may result in more clicks to your pages.
Three steps to rich snippets: 1. Google suggests using microdata, but any of the three formats below are acceptable. 2. Google supports rich snippets for these content types: 3. That’s it! Use HTML markup if... GoodRelations: The Professional Web Vocabulary for E-Commerce. ProductDB - ProductDB. Linked Data | Linked Data - Connect Distributed Data across the Web. Open Graph Overview - Développeurs Facebook. RDF - Semantic Web Standards. Overview RDF is a standard model for data interchange on the Web. RDF has features that facilitate data merging even if the underlying schemas differ, and it specifically supports the evolution of schemas over time without requiring all the data consumers to be changed.
RDF extends the linking structure of the Web to use URIs to name the relationship between things as well as the two ends of the link (this is usually referred to as a “triple”). Using this simple model, it allows structured and semi-structured data to be mixed, exposed, and shared across different applications. This linking structure forms a directed, labeled graph, where the edges represent the named link between two resources, represented by the graph nodes. Recommended Reading The RDF 1.1 specification consists of a suite of W3C Recommendations and Working Group Notes, published in 2014. A number of textbooks have been published on RDF and on Semantic Web in general. Discussions on a possible next version of RDF.