\begin{longtable}{p{3.1cm}p{8.6cm}p{4.3cm}}
\caption{Tables required by the research design, current implementation and status}\label{tab:datamodel}\\
\toprule
Required table & Current implementation (database, table, key fields) & Status \\
\midrule
\endfirsthead
\toprule
Required table & Current implementation (database, table, key fields) & Status \\
\midrule
\endhead
\bottomrule
\endfoot
\texttt{universe\_snapshots} & \texttt{data/metadata/universe.json} + \texttt{companies} (CIK, ticker(s), name, sector, flags \texttt{in\_sp500}/\texttt{in\_russell3000}, fund weight, SIC, state, exchange, FYE, shard); snapshot date and source URL recorded & Partial: no file hash, no membership dates, no match confidence \\
\texttt{issuers} & \texttt{companies} (one row per CIK; former names from SEC header stored in metadata JSON only) & Partial: no name history, no parent/subsidiary links \\
\texttt{filings} & \texttt{filings} (accession PK, CIK FK, form, filing/report dates, SEC URL, local path, size, download and parse status) & Implemented; no acceptance timestamp, no checksum \\
\texttt{sections} & \texttt{filing\_sections} (UUID PK, accession FK, name, item, order, text, counts) & Implemented; no character offsets into raw HTML \\
\texttt{project\_mentions} & \texttt{project\_mentions} (SHA-1 id, accession, CIK, section id, name, type, description, objective, amount, raw amount, lists, years, status, confidence, backend, issuer context) & Implemented; no evidence span, no prompt hash, no five-way label \\
\texttt{projects} & \texttt{projects} (MD5 of CIK$|$type$|$location-or-name, representative fields, max amount, counts, first/last seen and cited years) & Implemented (deterministic key) \\
\texttt{project\_mention\_links} & implicit in the key (every mention maps to exactly one project) & Proposed: explicit table with score, resolver version, adjudication \\
\texttt{project\_events} & \texttt{project\_timeline} (one row per mention: date, form, status, amount, confidence, snippet) & Partial: mention rows, not typed events \\
\texttt{project\_amounts} & \texttt{amount\_usd}/\texttt{amount\_raw} on mentions; max on projects & Proposed: type, currency, scale, basis, realization flag \\
\texttt{extraction\_runs} & \texttt{extracted\_sections} ledger (section, accession, backend, n\_mentions, timestamp) + run logs & Partial: no prompt/schema/taxonomy hashes, no call status \\
\texttt{human\_labels} & --- & Proposed \\
\end{longtable}