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SWC builds API to tag online resources automatically – and suggest related content

06. November 2012, by Thomas Thurner

Semantic Web Company has developed a thesaurus based automatic tagging API for its customer REEEP. The "free-to-use" tagging tool will automatically tag documents and web content that cover renewable energy, energy efficiency and climate-relevant topics according to the well maintained Reegle’s Clean Energy and Climate Change Thesaurus. Furthermore it can also suggest related documents from the growing pool of content that has already been indexed using the tool.

“By automating the tagging process, we can help ensure that content is classified in a consistent way across the entire sector, based on our Clean Energy Thesaurus” notes Florian Bauer, Operations & IT Director of REEEP. “This will help make major depositories of existing information open and accessible, and help promote clean, low-carbon development in the process.”In addition to tagging, the API can also make suggestions for related reading from the web resources already indexed, thus enriching the content of any website. “Sharing your own indexed resources with the API content pool can increase the outreach of your documents hugely,” recommends Denise Recheis, expert in knowledge management at reegle.

Based on PoolParty's powerful Thesaurus Management

Core of the new API is the Clean Energy and Climate Change Thesaurus maintained and enriched using PoolParty Thesaurus Server (PPT). Based on the semantic knowledge model PoolParty Extractor (PPX) does domain specific text mining to extract meaningful phrases, named entities categories and other metadata available through a HTML API.

Try out service

The tool is available at, where you can try out the API on the spot. Simply cut and paste a block of text, and a demonstration will show all of the concepts, terms and categories that the tool automatically generates.

Free API key

On this site, web developers can register to get a free API key for each project, with no limit on the number of keys. When logged in, the dashboard includes a request builder to help developers to build the necessary code. The service is available in five different languages: English, French, Spanish, Portuguese and German. The API returns the formats RDF/XML and JSON.


The reegle tagging API project is a collaborative effort with NREL (OpenEI), weADAPT and IDS (eldis), and was made possible by support from the CDKN Innovation Fund. For further information about the reegle tagging API Reeep’s Thesaurus and Knowledge Manager Denise Recheis is available.