Source: Schema.org v30.1 vocabulary. Official numTracks property definition.
What does numTracks mean?
The number of tracks in this album or playlist.
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