Source: Schema.org v30.1 vocabulary. Official breadcrumb property definition.
What does breadcrumb mean?
A set of links that can help a user understand and navigate a website hierarchy.
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