Source: Schema.org v30.1 vocabulary. Official populationType property definition.
What does populationType mean?
Indicates the populationType common to all members of a [[StatisticalPopulation]] or all cases within the scope of a [[StatisticalVariable]].
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