Pith Number

pith:UQWX5EXP

pith:2019:UQWX5EXPY6Q35SSZYIOALXIOCT

not attested not anchored not stored refs pending

Language Independent Sequence Labelling for Opinion Target Extraction

German Rigau, Rodrigo Agerri

arxiv:1901.09755 v1 · 2019-01-28 · 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{UQWX5EXPY6Q35SSZYIOALXIOCT}

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	2026-05-17T23:55:23.915804Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a42d7e92efc7a1beca59c21c05dd0e14e23542ac07a6af53fff1ed70f21a05ec

Aliases

arxiv: 1901.09755 · arxiv_version: 1901.09755v1 · doi: 10.48550/arxiv.1901.09755 · pith_short_12: UQWX5EXPY6Q3 · pith_short_16: UQWX5EXPY6Q35SSZ · pith_short_8: UQWX5EXP

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/UQWX5EXPY6Q35SSZYIOALXIOCT \
  | 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: a42d7e92efc7a1beca59c21c05dd0e14e23542ac07a6af53fff1ed70f21a05ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d7c8843cc3e7fc4c47a4996bbe72765c159b52cc09363fe84680b9b51c5df0ab",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2019-01-28T15:55:22Z",
    "title_canon_sha256": "8cfc47d4584a457fc8796c4f70d5d869023a7fa75e86c30af9f07359271fc699"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.09755",
    "kind": "arxiv",
    "version": 1
  }
}