The above queries, as well as those described in the Full Text Search Queries section, can be applied to scalar properties. Some repositories support the use of properties that are themselves an item from another (or the same) item descriptor. For example, the address property might point to another item descriptor which itself has properties like city, state, and zip.
Queries may drill down through these properties by using a dot notation. For example:
address.zip = "48322"
This query means “find all people whose address property points to an Address item whose zip code is 48322”.
RQL allows for multiple levels of “property-of-property” expressions. For example, department.manager.address.state.
