core + attic (Attic Area): these terms have been either depricated from the core or extentions, or removed from pending as not accepted into the full vocabulary.

sibling

Canonical URL: http://schema.org/sibling

Thing > Property > sibling

A sibling of the person.

Usage: Between 100 and 1000 domains
Values expected to be one of these types
Person
Used on these types
Person
Supersedes
siblings

Schema Version 3.2