Source: Schema.org v30.1 vocabulary. Official specification property definition.
What does specification mean?
A specification of the product, often grouped by a section header/name. This is a cleaner alternative to additionalProperty for strict retail product specifications.
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