EntityRelationship

close: schema:parentOrganization

A directed ownership link between two entities, sourced from GLEIF Level 2 data or derived. Keeping `source` on the row is what lets a user trust the GLEIF-asserted links and treat the derived ones with more caution.

Slots

slot	range		description
`parent_dataco_id`	`string`	required	The owning entity in the relationship.
`child_dataco_id`	`string`	required	The owned entity in the relationship.
`rel_type`	`RelationshipTypeEnum`	required	The nature of the ownership link.
`relationship_source`	`string`	required	Where the link came from — `gleif_l2` for a GLEIF-asserted relationship, `derived` for one Certvas inferred. Kept so the two can be trusted differently.
`observed_at`	`datetime`	required	When Certvas itself observed this value. Never a proxy for publication date.
`source_ref`	`string`	required	URL or document-hash pointer into the immutable raw archive.
`license_class`	`string`	required	License Register ID governing redistribution of THIS row. Per-row rather than per-table because a single table legitimately mixes sources with different terms.
`valid_from`	`date`	required	Start of the interval over which this assertion holds.
`valid_to`	`date`	optional	End of the validity interval; NULL means current. Half-open, so `valid_from <= t < valid_to` selects without double-counting the boundary.