Pith Number

pith:LT2UIBNH

pith:2021:LT2UIBNHXKKIA43BGGFLCNEL5E

not attested not anchored not stored refs pending

An Open Natural Language Processing Development Framework for EHR-based Clinical Research: A case demonstration using the National COVID Cohort Collaborative (N3C)

Andrew Wen, Andrew Williams, Christopher G. Chute, Dalton Schutte, Daniel Harris, Emily Pfaff, Hongfang Liu, Huan He, Hua Xu, Joel H Saltz, John D. Osborne, Liwei Wang, Masoud Rouhizadeh, Mei Liu, Melissa A. Haendel, National COVID Cohort Collaborative (N3C), National COVID Cohort Collaborative (N3C) Natural Language Processing (NLP) Subgroup, Noor Abu-el-rub, Peter Szolovits, Rafael Fuentes, Ramakanth Kavuluru, Robert Miller, Rui Zhang, Sijia Liu, Stephanie S Hong, Sunyang Fu, Thomas Schaffter, Tim Duong, Umit Topaloglu, Yongqun He

arxiv:2110.10780 v3 · 2021-10-20 · cs.CL · cs.IR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LT2UIBNHXKKIA43BGGFLCNEL5E}

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	2026-07-05T04:07:06.041702Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5cf54405a7ba94807361318ab1348be93b0334f7e8afc314fa35968fcc8de27d

Aliases

arxiv: 2110.10780 · arxiv_version: 2110.10780v3 · doi: 10.48550/arxiv.2110.10780 · pith_short_12: LT2UIBNHXKKI · pith_short_16: LT2UIBNHXKKIA43B · pith_short_8: LT2UIBNH

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/LT2UIBNHXKKIA43BGGFLCNEL5E \
  | 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: 5cf54405a7ba94807361318ab1348be93b0334f7e8afc314fa35968fcc8de27d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e88ec237333642fa1805a759df5afc21fc9e38f1cbf4f71532e68ce0191251a5",
    "cross_cats_sorted": [
      "cs.IR"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2021-10-20T21:09:41Z",
    "title_canon_sha256": "87864af1b8bea84346dddb974d2436d77c207ae5986f6ea716bf978cf8e4c62c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2110.10780",
    "kind": "arxiv",
    "version": 3
  }
}