Pith Number

pith:3T5KPJFA

pith:2021:3T5KPJFAIDE5ALR5FVYCZ35MUO

not attested not anchored not stored refs pending

CLICKER: A Computational LInguistics Classification Scheme for Educational Resources

Alexander Fabbri, Benjamin Chen, Dragomir Radev, Girish K. Palshikar, Irene Li, Rena Kawamura, Richard Zhou, Swapnil Hingmire, Tammy Liao, Thomas George, Vanessa Yan, Wai Pan Wong, Xiangru Tang, Yixin Liu

arxiv:2112.08578 v1 · 2021-12-16 · 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{3T5KPJFAIDE5ALR5FVYCZ35MUO}

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	2026-07-05T03:41:30.663874Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dcfaa7a4a040c9d02e3d2d702cefaca3a959ee0e8a9bd303e5c6a086e63c5bc6

Aliases

arxiv: 2112.08578 · arxiv_version: 2112.08578v1 · doi: 10.48550/arxiv.2112.08578 · pith_short_12: 3T5KPJFAIDE5 · pith_short_16: 3T5KPJFAIDE5ALR5 · pith_short_8: 3T5KPJFA

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/3T5KPJFAIDE5ALR5FVYCZ35MUO \
  | 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: dcfaa7a4a040c9d02e3d2d702cefaca3a959ee0e8a9bd303e5c6a086e63c5bc6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca9a4c9ba14f563d8c8501ed5ae4bf4447e03f96b93469a9ef83263e27c5e6bb",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2021-12-16T02:40:43Z",
    "title_canon_sha256": "c943b844758c5f45f9cec36c23d99bb89a0d99ef876b6cc4402d5394925e1de0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2112.08578",
    "kind": "arxiv",
    "version": 1
  }
}