Source: Schema.org v30.1 vocabulary. Official featureList property definition.
What does featureList mean?
Features or modules provided by this application (and possibly required by other applications).
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