Interface IParentComposition

Finished documentation for the inverse relation property.

Inverse relation property name generated in the target model. Typically plural for 1:N (e.g., "comments"), singular for 1:1. When this foreign key names the actor or role that performed an action (the user who authored an article), encode that direction here: authoredArticles, not a bare articles that reads as "rows about this row."

Whether every parent must have this component in a valid business state.

• "optional": zero-or-one when unique, zero-or-more when not unique.
• "required": exactly-one when unique, one-or-more when not unique.

Parent composition: the child row belongs to the parent lifecycle and is managed through the parent context. The composition child must be a user-creatable stance ("primary" or "subsidiary"); a snapshot/material/ actor/session row is created by its own lifecycle and must use an association instead.