Unknown Term

This message indicates an IRI from the schema.org domain was found, but it is not defined by the official vocabulary.

The most common cause for this is a typo due to misspelling or case-sensitivity. It can also occur when validating against an older Schema.org release which has not yet defined the term.

Examples

Try it

{ "@context": "http://schema.org",
  "@type": "ExampleUnknownThing" }

Try it

{ "@context": "http://schema.org",
  "exampleUnknownProperty": "Example" }

Try it

{ "@context": "http://schema.org",
  "http://example.com/p": {
    "@type": "ExampleUnknownDataType",
    "@value": "Example" } }

Try it

{ "@context": "http://schema.org",
  "http://example.com/p": {
    "@id": "schema:ExampleUnknown" } }