identity-graph

name	identity-graph
description	Cross-source identity reconciliation for every UK MP and peer in this repository, as a single RDF N-Quads file. Bridges Members API id ↔ MNIS id ↔ DDP person LocalId ↔ scraped per-MP website ↔ APPG officer roles ↔ GOV.UK people factoids ↔ Wikidata QIDs, each in its own named graph. Use whenever a question needs to join data across more than one of those sources by person — most commonly to confirm that "the gov.uk page for X", "the psephology winning candidacy for X" and "the X currently sitting in the Lords as Lord Y" are the same human. The `parl:memberId` literal is the stable join key; it stays the same across MP-then-peer career transitions (e.g. Hague MNIS 379 = MP for Richmond + Lord Hague of Richmond; Cameron MNIS 1467 = MP for Witney + Lord Cameron of Chipping Norton 2023; Darling MNIS 596 = MP for Edinburgh SW + Lord Darling of Roulanish 2015-20).
license	Open Parliament Licence v3.0 (upstream Parliament IDs); CC0 (Wikidata); see per-source notes in the README
metadata	{"provenance":{"tier":2,"operator":"forgetmenot (cross-source resolver)","citation-short":"via forgetmenot identity-graph","citation-formal":"forgetmenot identity-graph, build {git-rev}","confidence":"derived"}}

identity-graph — cross-source identity for UK MPs and peers

A single N-Quads file — third_party/identity-graph/identity.nq — that reconciles every UK MP and peer captured in this repository across the identifier systems they actually appear under. 58,189 quads, ~9.9 MB uncompressed (~470 KB gzipped), 7 named graphs.

The full schema, build details, current totals and a worked example live in third_party/identity-graph/README.md — this skill is the discovery surface for skill-matching against questions like "is this the same person as that", "what's the Wikidata QID for the MP for X", "does this MP have a peerage too", "give me everyone who's an APPG officer and bridged to GOV.UK".

Named graphs

Graph	Source	What it carries
…/identity/members-api	per-MP dumps	name, party, house, constituency, MNIS id
…/identity/ddp-sparql	live DDP SPARQL	DDP LocalId, owl:sameAs Members→DDP bridge, given/family names
…/identity/scraped	per-MP polite crawl	site platform, homepage, RSS feeds, social profiles
…/identity/appg	APPG resolver	APPG officerships per person, reified with role + group
…/identity/govuk	GOV.UK factoid corpus	owl:sameAs Members → GOV.UK people-page
…/identity/wikidata	Wikidata bridge corpus	owl:sameAs Members → Wikidata entity + fm:wikidataQid literal (673 members)
…/identity/provenance	self-describing	PROV-O / VoID metadata for each of the six source graphs

The bridge predicates

• parl:memberId (string literal) — Parliament's stable id. Same value across MP and peer careers. The canonical join key. All seven graphs use it or are addressed by an IRI derived from it.
• owl:sameAs to:
  • https://id.parliament.uk/<LocalId> (DDP)
  • https://www.gov.uk/government/people/<slug> (when GOV.UK publishes a page for that person)
  • https://www.wikidata.org/entity/Q<n> (when Wikidata has a QID; 673 today)
• schema:givenName / schema:familyName for name-based filtering when the id isn't to hand.
• fm:scrapedSiteDir, fm:scrapedFeed, fm:memberDump filesystem paths into the per-MP corpora.

Build

npm run identity-graph

Reads from local corpora + makes one SPARQL request to DDP (5,425 bindings in a single fetch). Writes identity.nq and _index.json under third_party/identity-graph/.

Query it

The corpus is N-Quads and queryable via the local-sparql skill:

scripts/local-sparql-serve.sh third_party/identity-graph/identity.nq
#   → http://127.0.0.1:8765/

Or merged with other corpora — psephology, govuk-orgchart factoids, FCDO treaties — for cross-source joins:

scripts/local-sparql-serve.sh \
  third_party/data/psephology/all.nq.gz \
  third_party/identity-graph/identity.nq \
  third_party/govuk/html/orgcharts/extractors/factoids/all.nq

Working examples in scripts/test-cabinet-won.mjs and scripts/test-peers-in-cabinet.mjs.

Caveats (read the data-quality skill)

The data-quality skill carries the "peerage and the cabinet" worked example which documents the edge cases this corpus DOES and DOES NOT cover — particularly:

• parl:memberId reconciles MP and peer careers (Hague, Cameron, Darling all verified end-to-end).
• The corpus does NOT carry peerage-creation dates — for "was X a peer on date Y?" you need the Lords Library register or DDP.
• The 273 GOV.UK bridges and 673 Wikidata bridges have residual matcher misses; specific cases (e.g. Nick Thomas-Symonds) are logged in docs/upstream-bugs.md.