Schema.org property reference

source — Schema.org Property Guide

Learn the meaning of Schema.org source, which types use it and its expected value types, with official source links.

Source: Schema.org v30.1 vocabulary. Official source property definition.

What does source mean?

The source or cause of the event.

Schema.org domainIncludes and rangeIncludes are descriptive guidance, not strict validation prohibitions. Check the official reference for updates.