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Linked Data

Linked Data

Linked Data is a method of exposing, sharing and connecting data on the web via dereferenceable URIs. Linked Data aims to extend the Web with a data commons by publishing various open datasets as RDF on the Web and by setting RDF links between data items from different data sources. The Linked Data cloud currently consists of over 7.4 billion RDF triples, interlinked by 142+ million RDF links. A diagram of the linked data cloud, as of 2011, is shown below.

AlchemyAPI provides comprehensive support for RDF and Linked Data, enabling any content to be brought into the semantic web with relative ease. Linked data is available for entity extraction, concept tagging and relation extraction, and it allows an incredible amount of additional information to be analyzed.

For example, if Apple, Inc. is identified as an entity in your content, using Linked Data makes it possible to get the following information: number of Apple employees, number of worldwide Apple locations, or last year's Net Operating Income. If AlchemyAPI finds a member of Congress in the content, linked data can access his or her picture, birth date, party affiliation, alma Mater or successor. The possibilities are endless.

The Linked Data Cloud

The Linked Data Cloud

Want to test out our linked data support?

Supported Linked Data Resources

The following linked data resources are used by AlchemyAPI. If linked data is enabled and an entry for an extracted entity or tagged concept exists in any of these resources, it will be returned as part of the response.

  • DBpedia - a crowd-sourced community effort to extract structured information from Wikipedia and make this information available on the Web.
  • Freebase - a community-curated database of well-known people, places and things.
  • US Census - quick, easy access to facts about people, business, and geography.
  • GeoNames - the GeoNames geographical database covers all countries and contains over eight million placenames that are available for download free of charge.
  • UMBEL - the "Upper Mapping and Binding Exchange Layer," it's designed to help content interoperate on the Web.
  • OpenCyc - the gateway to the full power of Cyc, the world's largest and most complete general knowledge base and commonsense reasoning engine.
  • YAGO - a huge semantic knowledge base containing more than 120 million facts about more than 10 million entities.
  • MusicBrainz - an open music encyclopedia that collects music metadata and makes it available to the public.
  • CIA Factbook - provides information on the history, people, government, economy, geography, communications, transportation, military, and transnational issues for 267 world entities.
  • CrunchBase - the free database of technology companies, people, and investors that anyone can edit.


If an entity or concept has its own website, the link will be returned in the response as part of the linked data.

Geographic Coordinates

For entities and concepts that have a physical location, the latitude and longitude of the location will be included.