Source: Schema.org v30.1 vocabulary. Official volumeNumber property definition.
What does volumeNumber mean?
Identifies the volume of publication or multi-part work; for example, "iii" or "2".
Parent properties
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