Source: Schema.org v30.1 vocabulary. Official item property definition.
What does item mean?
An entity represented by an entry in a list or data feed (e.g. an 'artist' in a list of 'artists').
Used on types (domainIncludes)
Expected value types (rangeIncludes)
Schema.org domainIncludes and rangeIncludes are descriptive guidance, not strict validation prohibitions. Check the official reference for updates.
Related reference
Browse all Schema.org types and properties · Google feature support status