Type Alias CrossReferenceRelationship

CrossReferenceRelationship:
    | "follows_up"
    | "preceded_by"
    | "related"
    | "contradicts"
    | "deepens"

Describes a directional relationship between two articles.

follows_up: Current article is a follow-up to the target (target is older)
preceded_by: Current article precedes the target (target is newer)
related: Articles share significant topic/actor overlap
contradicts: Articles present opposing analyses
deepens: Current article provides deeper analysis of the target