Curated datasets

Vlada ontology layer one (event)

vlada_ontology.l1_event·live·mart

Rows

565

Columns

History

N/A

Card

nocolumns only

Typed tools

What it is

1The Vlada ontology, layer one (who holds and who owns every Medicare, Medicaid and Marketplace instrument, over time), SIGNED by Ben on build v3o (2026-10-28; docs/architecture/ontology-v2/L1-SIGNOFF.md).
2Permanent IDs; a legal entity is not its brand nor the contract it holds; history is dated events with filings; every fact graded A/B/C with its evidence; two clocks.
3Built by tools/ontology2/build.py, served by tools/ontology2/serve.py (the view moves only to a signed build).
4Tools: resolve_entity, describe_entity;
5API: /v1/entities.

Grain

Key	Grain
N/A	1One row per sourced corporate event: acquisition, merger, formation, transfer of business, divestiture, rename, with announced and closed dates, buyer and targets.

Columns (10)

Column	Type	Meaning
`event_id`	string
`type`	string
`status`	string
`announced`	string
`closed`	string
`buyer`	string
`targets`	string
`label`	string
`evidence_id`	string
`recorded_version`	string

Query it

describe_data_source(source_fqn="vlada_ontology.l1_event")     # the card, live
query_substrate(sql="SELECT * FROM vlada_ontology.l1_event WHERE <filter> LIMIT 100")

Item	Value
Typed tools that read it	describe_entity, resolve_entity
Identity key	`entity_id`
Join	`how_to_join(source_fqn="vlada_ontology.l1_event")`
Raw door	Athena (read-only): vlada_ontology.l1_event
Note	Dates are strings YYYY-MM-DD; an empty valid_to is an open end; from_basis first_observed means "at least since"; observed_to means "last seen". Skill docs/architecture/ontology-v2/API-CONTRACT.md.

This page as markdown: /docs-md/data/vlada_ontology_l1_event.md · every page in one file: /llms-full.txt