Pith Number

pith:2SYRTLEC

pith:1999:2SYRTLECK6VTRIQ7UKCXPSN2MP

not attested not anchored not stored refs pending

A Formal Framework for Linguistic Annotation

Mark Liberman (University of Pennsylvania), Steven Bird

arxiv:cs/9903003 v1 · 1999-03-02 · cs.CL

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2SYRTLECK6VTRIQ7UKCXPSN2MP}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-04T14:25:10.106484Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4b119ac8257ab38a21fa28577c9ba63c43159e548204a4323db7e259740f00c

Aliases

arxiv: cs/9903003 · arxiv_version: cs/9903003v1 · doi: 10.48550/arxiv.cs/9903003 · pith_short_12: 2SYRTLECK6VT · pith_short_16: 2SYRTLECK6VTRIQ7 · pith_short_8: 2SYRTLEC

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/2SYRTLECK6VTRIQ7UKCXPSN2MP \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: d4b119ac8257ab38a21fa28577c9ba63c43159e548204a4323db7e259740f00c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd37747451c4e33f9250829210ea2e92c06911d09bfb30b9a8dbe007466554e9",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "cs.CL",
    "submitted_at": "1999-03-02T12:30:55Z",
    "title_canon_sha256": "38a3f9990313c7149e2dc2bc0c73f5f607ebcc088d2bba9e5bd51b5e82b524ac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/9903003",
    "kind": "arxiv",
    "version": 1
  }
}