Pith Number

pith:HCIKK5DT

pith:2018:HCIKK5DTGHWGSHROHXJ4EPOPK2

not attested not anchored not stored refs pending

Obligation and Prohibition Extraction Using Hierarchical RNNs

Achilleas Michos, Ilias Chalkidis, Ion Androutsopoulos

arxiv:1805.03871 v1 · 2018-05-10 · 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{HCIKK5DTGHWGSHROHXJ4EPOPK2}

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	2026-05-18T00:16:16.512282Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3890a5747331ec691e2e3dd3c23dcf56b8c477b16e38edcdcf82bb42e4471c6a

Aliases

arxiv: 1805.03871 · arxiv_version: 1805.03871v1 · doi: 10.48550/arxiv.1805.03871 · pith_short_12: HCIKK5DTGHWG · pith_short_16: HCIKK5DTGHWGSHRO · pith_short_8: HCIKK5DT

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/HCIKK5DTGHWGSHROHXJ4EPOPK2 \
  | 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: 3890a5747331ec691e2e3dd3c23dcf56b8c477b16e38edcdcf82bb42e4471c6a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c5a6eedce9da16e659d7bf3c68d8c85a4bb524d33ddf6df5bf4fc640769a0aa8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2018-05-10T08:04:17Z",
    "title_canon_sha256": "627d4b58c7f5ad1ac1431feb684fa1d01f6eeb58594ffeb871c8c1d32bbf8910"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.03871",
    "kind": "arxiv",
    "version": 1
  }
}