Old COBOL. Excel macros. Stored procedures. Email threads. Slack. The 80% of your business logic that doesn't live in your warehouse — extracted and bound.

The actual rules your company runs on are not in your data warehouse. They are buried in a 1998 stored procedure that excludes vendor 4711 from AP aging, the VBA macro that computes DSO with a 90-day cutoff, the ABAP routine that classifies revenue recognition, the email from the controller in 2019 explaining why RSU vests are excluded, the Slack thread that established the new escalation policy, the Confluence page nobody updates but everyone references. Catalog tools embed a link next to the table and call it done — the text body, the code body, the macro body is never actually read. Eisberg parses every source. Extracts the entities, the rules, the exceptions. Binds them to your business ontology as governed first-class facts. Signs the provenance chain. Cites them in every agent answer. "The stored procedure last touched 2008-04-12 excludes vendor 4711 from AP aging — that rule is now bound to the AR-Aging metric and replayable from the audit log" is a different product than "the database schema is in this catalog." Every other platform ships the second. Eisberg ships the first.