Source: Schema.org v30.1 vocabulary. Official softwareAddOn property definition.
What does softwareAddOn mean?
Additional content for a software application.
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