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# category

#### Thing > Property > category

A category for the item. Greater signs or slashes can be used to informally indicate a category hierarchy.
Usage: Between 50,000 and 100,000 domains
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- 'category' is mentioned in extension layer: meta
- 'category' is mentioned in layer: core
- 'category' is mentioned in extension layer: health-lifesci

Values expected to be one of these types
`Text` `Thing`

Expected values defined in extensions
`PhysicalActivityCategory` - defined in the health-lifesci extension

Used on these types
`Invoice` `Offer` `Product` `Service`

Used on types defined in extensions
`Class` - defined in the meta extension `PhysicalActivity` - defined in the health-lifesci extension `Property` - defined in the meta extension

Schema Version 3.0