Pith Number

pith:5F2FTTYQ

pith:2026:5F2FTTYQ7VROHAVDZWKV5FKCML

not attested not anchored not stored refs pending

STEM: Structure-Tracing Evidence Mining for Knowledge Graphs-Driven Retrieval-Augmented Generation

Bin Chen, En Xu, Haibiao Chen, Peng Yu, Yinfei Xu

STEM reframes multi-hop reasoning over knowledge graphs as schema-guided graph search to raise both accuracy and evidence completeness.

arxiv:2604.22282 v2 · 2026-04-24 · cs.CL

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5F2FTTYQ7VROHAVDZWKV5FKCML}

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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.

Claims

C1strongest claim

STEM significantly improves both the accuracy and evidence completeness of multi-hop reasoning graph retrieval, and achieves State-of-the-Art performance on multiple multi-hop benchmarks.

C2weakest assumption

That the Semantic-to-Structural Projection pipeline can effectively leverage KG structural priors to decompose queries into atomic relational assertions and construct an adaptive query schema graph without significant semantic mismatch or loss of query intent.

C3one line summary

STEM is a new framework for multi-hop KGQA that projects queries to adaptive schema graphs and uses Triple-GNN guidance to retrieve more accurate and complete evidence subgraphs, claiming SOTA results.

Receipt and verification

First computed	2026-05-20T00:04:32.570612Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e97459cf10fd62e382a3cd955e954262c48793c0235359cbfed31466584c1223

Aliases

arxiv: 2604.22282 · arxiv_version: 2604.22282v2 · doi: 10.48550/arxiv.2604.22282 · pith_short_12: 5F2FTTYQ7VRO · pith_short_16: 5F2FTTYQ7VROHAVD · pith_short_8: 5F2FTTYQ

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/5F2FTTYQ7VROHAVDZWKV5FKCML \
  | 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: e97459cf10fd62e382a3cd955e954262c48793c0235359cbfed31466584c1223

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3c3947961a31c56bb9dbc55134de96f8199668d1aaf9d01d4864b51eeb03a0bd",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2026-04-24T06:56:58Z",
    "title_canon_sha256": "09f41f7f6619c1ae9cfae4eb38774ea288b056e9e23e53e5c8ea7179c383f0a3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.22282",
    "kind": "arxiv",
    "version": 2
  }
}