Source: Schema.org v30.1 vocabulary. Official isProprietary property definition.
What does isProprietary mean?
True if this item's name is a proprietary/brand name (vs. generic name).
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