Source: Schema.org v30.1 vocabulary. Official contactOption property definition.
What does contactOption mean?
An option available on this contact point (e.g. a toll-free number or support for hearing-impaired callers).
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