Pith Number

pith:2S2BCKHK

pith:2012:2S2BCKHKBXHY4KTPJ7RKYNQQ73

not attested not anchored not stored refs pending

USFD2: Annotating Temporal Expresions and TLINKs for TempEval-2

Leon Derczynski, Robert Gaizauskas

arxiv:1203.5060 v1 · 2012-03-22 · cs.CL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2S2BCKHKBXHY4KTPJ7RKYNQQ73}

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

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	2026-05-18T03:59:28.028626Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4b41128ea0dcf8e2a6f4fe2ac3610feed8c3054447d8cca7f71f7ddab8f8b37

Aliases

arxiv: 1203.5060 · arxiv_version: 1203.5060v1 · doi: 10.48550/arxiv.1203.5060 · pith_short_12: 2S2BCKHKBXHY · pith_short_16: 2S2BCKHKBXHY4KTP · pith_short_8: 2S2BCKHK

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/2S2BCKHKBXHY4KTPJ7RKYNQQ73 \
  | 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: d4b41128ea0dcf8e2a6f4fe2ac3610feed8c3054447d8cca7f71f7ddab8f8b37

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b77b76a552d11de46a82761fdc2230171e9ca50d9dece2b8596c79d2e9e258e4",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2012-03-22T17:59:22Z",
    "title_canon_sha256": "0ed025053c6ee36430ea3304d8b3bc5dc2b57171e71c48010f7773464cb83108"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.5060",
    "kind": "arxiv",
    "version": 1
  }
}