Source: Schema.org v30.1 vocabulary. Official includedComposition property definition.
What does includedComposition mean?
Smaller compositions included in this work (e.g. a movement in a symphony).
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