{
 "version": "2026-07-09",
 "publisher": "New Mexico Literacy Project",
 "license_note": "Lookup responses are free to use with attribution; underlying sources are public/open data (see sources per index).",
 "docs": "https://newmexicoliteracyproject.org/api/openapi.json",
 "indexes": {
  "lccn": {
   "records": 20874609,
   "sources": [
    "Library of Congress MDSConnect open bulk records (2016)",
    "Open Library editions dump (2026-06) — net-new merge",
    "Library of Congress SRU live-catalog harvest (ongoing top-ups)"
   ],
   "year_range": "1898-2026",
   "fields": [
    "lccn",
    "title",
    "author",
    "year",
    "publisher",
    "isbn10",
    "isbn13",
    "asin"
   ],
   "caveats": "LCCN registry authority is the Library of Congress (lccn.loc.gov). A miss here means 'not in NMLP's 20.9M-record snapshot', which covers the overwhelming majority of cataloged books but is not proof no record exists."
  },
  "cd": {
   "records": 8719049,
   "sources": [
    "Discogs open data monthly dump (2026-07-01), CD identifier extraction"
   ],
   "kinds": [
    "matrix (incl. DIDX hub codes)",
    "catalog numbers",
    "barcodes"
   ],
   "caveats": "Music-club pressings (BMG/Columbia House 'D' numbers) are under-documented in all open databases; a miss on those is weak evidence."
  },
  "vinyl": {
   "records": 18978280,
   "sources": [
    "Discogs open data monthly dump (2026-07-01), vinyl identifier extraction"
   ],
   "kinds": [
    "matrix/runout etchings (prefix-matched at >=6 chars)",
    "catalog numbers",
    "barcodes"
   ],
   "caveats": "Matrix etchings vary copy-to-copy in stamper suffixes; exact-miss/prefix-hit is normal, and hand-etched deadwax may never match OCR-perfectly."
  }
 },
 "absence_semantics": "found:false responses list absent_from with per-index record counts at this version. Absence is evidence, not proof: it means the identifier is not in the named snapshots. It does NOT mean the item does not exist."
}