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ConceptNet 5

ConceptNet is a multilingual knowledge base, representing words and phrases that people use and the common-sense relationships between them. The knowledge in ConceptNet is collected from a variety of resources, including crowd-sourced resources (such as Wiktionary and Open Mind Common Sense), games with a purpose (such as Verbosity and nadya.jp), and expert-created resources (such as WordNet and JMDict).

Knowledge base documentation

• Edges and the information they represent
• Relations - Each assertion has a relation. These are the kinds of relations we're using so far, and what they mean.
• Web API
• Downloading
• Running your own copy using Solr and Python

Pages that may need to be updated:

• Graph structure
• URI hierarchy - how we know what /c/en/coffee means
• Copying and sharing ConceptNet

Pages that seriously need to be updated:

• Knowledge sources
• Changelog
• Known bugs

Version info

ConceptNet 5.2 is available for download and accessible over the Web.

Here are the major changes:

• The set of knowledge sources has changed. JMdict is in. ReVerb is out, because we couldn't filter it well enough.
• Some bugs in building from existing sources were fixed.
• ConceptNet can now be built from its raw data using a Makefile. (See Building from the Makefile)
• The code comes with everything you need to build and query "assoc spaces" -- vector spaces representing semantic connections between concepts -- thanks to the open-source release of assoc_space by Luminoso.
• The API now returns one result per assertion, even if that assertion comes from multiple sources.
• Because of that, the representation of knowledge sources has changed. The sources used to be lists of reasons that an assertion got added, and each one implicitly represented a conjunction. The "sources" field in the API now always contains one element for each assertion, and that element contains the full AND-OR tree of sources.

ConceptNet 5.1 documentation (may need to be updated)

Version 5.1 has a new, simpler representation of nodes and edges than ConceptNet 4.0 or 5.0, making it suitable to represent ConceptNet 5 with downloadable flat files and efficient search indexes.

The current version, 5.1.1, is an incremental update that maintains full API compatibility with 5.1.