Overview of all keyword tags in articles

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This page provides an overview of 4 tags, ordered by trending factor. Column headings allow re-sorting by other criteria. In the expanding tab below you can adjust filters to display sub-sets of tags and narrow the focus to specific items of interest (see FAQs on filtering for usage tips). Select this link to remove all filters.

Term Brief description Charts


Schema.org is an initiative launched on 2 June 2011 by Bing, Google and Yahoo!to "create and support a common set of schemas for structured data markup on web pages." On 1 November Yandex (whose search engine is the largest one in Russia) joined the initiative. They propose using their schemas and Microdata in HTML5 to mark up website content with metadata about itself. Such markup can be recognized by search engine spiders and other parsers, thus gaining access to the meaning of the sites. The initiative started with a small number of formats, but the long term goal is to support a wider range of schemas. The initiative also describes an extension mechanism for adding additional properties. Much of the vocabulary on schema.org was inspired by earlier formats such as Microformats, FOAF, GoodRelations and OpenCyc. RDF applications can use Microdata2RDF service. (Excerpt from <a href="http://en.wikipedia.org/wiki/Schema.org">Wikipedia article: Schema.org</a>)

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metadata schema registry

A metadata schema registry is a network service that stores and makes available information about the metadata schemas in use by other services. (Excerpt from <a href="http://www.ukoln.ac.uk/distributed-systems/jisc-ie/arch/glossary/">JISC Information Environment Glossary</a>)

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The word schema comes from the Greek word skhēma, which means shape, or more generally, plan. In English, both schemas and schemata are used as plural forms. In computer science, schema commonly refers to database schema or XML schema, a way to define the structure, content and, to some extent, the semantics of XML documents. (Excerpt from <a href="http://en.wikipedia.org/wiki/Schema">Wikipedia article: Schema</a>)

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xml schema

An XML schema is a description of a type of XML document, typically expressed in terms of constraints on the structure and content of documents of that type, above and beyond the basic syntactical constraints imposed by XML itself. These constraints are generally expressed using some combination of grammatical rules governing the order of elements, Boolean predicates that the content must satisfy, data types governing the content of elements and attributes, and more specialized rules such as uniqueness and referential integrity constraints. (Excerpt from <a href="http://en.wikipedia.org/wiki/Xml_schema">Wikipedia article: XML Schema</a>)

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