Source: Schema.org v30.1 vocabulary. Official functionalClass property definition.
What does functionalClass mean?
The degree of mobility the joint allows.
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