Source: Schema.org v30.1 vocabulary. Official equal property definition.
What does equal mean?
This ordering relation for qualitative values indicates that the subject is equal to the object.
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