Source: Schema.org v30.1 vocabulary. Official inker property definition.
What does inker mean?
The individual who traces over the pencil drawings in ink after pencils are complete.
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