I am searching for a Database containing a hierarchical Ontology of most objects.

For example, an Apple is a special type of an edible Fruit, which is a special type of Fruit. A Fruit is a physical Object and therefore has a volume, weight, smell etc.

I have found some openly available Ontological Databases, like dbpedia, but extracting the hierarchical Information is non-trivial.

Has anyone worked with similar Databases and is able to recommend something similar?

  • 2
    "extracting the hierarchical Information is non-trivial"-- I think you're going to run into this issue with any ontology. Having said that, see if you can find data in RDF triples format, which is probably the simplest it's going to get.
    – user3856
    Commented Jun 21, 2017 at 15:38
  • building off @BarryCarter's comment here, you should certainly check out wikidata, datasets that wikipedia are using.
    – albert
    Commented Jun 21, 2017 at 19:51
  • Although you already selected an answer, what do you want to use this data for? Better answers might still be possible...
    – Grimaldi
    Commented Jun 28, 2017 at 19:55

1 Answer 1


...but extracting the hierarchical information is non-trivial.

  • DBpedia T-Box dump is available to download as a separate file from this page.
  • Wikidata classes and properties dumps are available to download as separate files from this page.

I am searching for a database containing a hierarchical ontology of most objects.

Many of the so-called upper ontologies are in fact very comprehensive or have many domain-specific extensions:

There are also the so-called commonsense knowledge bases:

Many of these ontologies and commonsense knowledge bases are interlinked.

  • The commonsense bases seem very interesting and there are some awesome tools building upon them. Thanks!
    – JeD
    Commented Jun 25, 2017 at 20:57

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