Source: Schema.org v30.1 vocabulary. Official numConstraints property definition.
What does numConstraints mean?
Indicates the number of constraints property values defined for a particular [[ConstraintNode]] such as [[StatisticalVariable]]. This helps applications understand if they have access to a sufficiently complete description of a [[StatisticalVariable]] or other construct that is defined using properties on template-style nodes.
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