526 lines
18 KiB
Markdown
526 lines
18 KiB
Markdown
# 7-55 LightRAG DOCX 引用定位与 rerank 对齐设计 v1
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> 创建时间:2026-06-08
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>
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> 当前状态:`process`
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>
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> Owner:07-ai / knowledge-rag / 03-rust-web / office-preview
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>
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> 关联:
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> - `design/07-ai/done/7-50-lightrag-knowledge-rag-provider-v1.md`
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> - `design/07-ai/done/7-51-lightrag-post-commit-hardening-v1.md`
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> - `design/07-ai/process/7-54-raganything-multimodal-retrieval-alignment-v1.md`
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>
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> 参考代码:
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> - LightRAG:`/mnt/Data1T/Mnote_data/lightrag/LightRAG`
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> - NexusRAG:`/tmp/mnote-rag-eval-nexusrag`
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> - MNote:`rust/crates/mnote-web/src/routes/knowledge_rag.rs`
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## 1. 背景
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当前 DOCX / Office 资料检索的主要问题不是 LightRAG 完全不能检索,而是检索结果映射回 MNote resource tab 时容易错位。
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已验证的现状:
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- MNote 已通过 `/api/knowledge-rag/query` 调 LightRAG `/query/data`,并请求 `include_references=true` / `include_chunk_content=true`。
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- LightRAG 返回的 reference / chunk 可以包含 `file_path`、`chunk_id`、`content`,但不直接返回 MNote 可用的 `resourcePath/page/bbox/blockId`。
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- MNote 当前 `map_reference_plan(...)` 会用 chunk quote / query 去 sidecar `.blocks.jsonl` 里反查 block,再生成 `EvidenceLocator`。
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- PDF / image 经 MinerU 或 Docling 解析后通常有 `positions.type=bbox`,可以转 page/bbox。
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- DOCX native parser 生成的是 `positions.type=paraid`,真实样本里大量 `range=[null,null]`,不能可靠转 page/bbox。
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- 当前 LightRAG 已有 reranker,不应在 MNote 重复实现一套通用 reranker。
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本设计目标是把“LightRAG 已有能力”和“MNote 必须补的引用定位层”明确切开。
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## 2. CodeGraph 核对结论
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### 2.1 LightRAG 已有 reranker 主链
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源码证据:
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- `lightrag/base.py:83` `QueryParam` 默认 `mode="mix"`。
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- `lightrag/base.py:148` `enable_rerank` 由 `RERANK_BY_DEFAULT` 控制,默认 true。
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- `lightrag/utils.py:3278` `apply_rerank_if_enabled(...)` 调 `global_config["rerank_model_func"]`,支持 index-based rerank result,并把 `rerank_score` 写回 chunk。
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- `lightrag/utils.py:3362` `process_chunks_unified(...)` 的顺序是 rerank -> `min_rerank_score` 过滤 -> `chunk_top_k` 截断 -> token truncation。
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- `lightrag/api/lightrag_server.py:1894` server 支持 `cohere` / `jina` / `aliyun` rerank binding;vLLM 可走 Cohere-compatible endpoint。
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- `docs/LightRAG-API-Server.md` 明确 rerank 是 query-time improvement,不需要重建索引。
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当前本机运行态:
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```json
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{
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"core_version": "1.5.1",
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"configuration": {
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"enable_rerank": false,
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"rerank_binding": "null",
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"rerank_model": null,
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"min_rerank_score": 0.0
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},
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"rerank_queue_status": {
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"available": false
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}
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}
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```
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结论:MNote 不新增通用 reranker。MNote 只负责配置、健康状态展示、请求参数透传和结果引用消费。
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### 2.2 LightRAG 已有 DOCX native parser 与 sidecar
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源码证据:
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- `lightrag/pipeline.py:2897` `parse_native(...)` 对 pending DOCX 调 `extract_docx_blocks(...)`。
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- `lightrag/parser/docx/parse_document.py:1611` `extract_docx_blocks(...)` 按 heading / paragraph / table 拆 block。
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- `lightrag/parser/docx/ir_builder.py:304` DOCX block position 写为 `IRPosition(type="paraid", range=[uuid_start, uuid_end])`。
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- `lightrag/sidecar/writer.py:256` `.blocks.jsonl` content row 包含 `blockid/content/heading/parent_headings/level/positions`。
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真实 sidecar 现状:
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```json
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{
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"type": "content",
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"blockid": "5c6cda46137773fba8cf06fcfc08c313",
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"content": "...",
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"heading": "Preface/Uncategorized",
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"positions": [
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{"type": "paraid", "range": [null, null]}
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]
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}
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```
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结论:DOCX 引用定位不能伪造成 PDF 式 page/bbox。短期正确目标是段落级 / block 级定位。
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### 2.3 NexusRAG 的强参考点
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NexusRAG 不是只针对 PDF。
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- `backend/app/services/document_parser/docling_parser.py` 支持 `.pdf/.docx/.pptx/.html`。
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- `backend/app/services/document_parser/marker_parser.py` 支持 `.pdf/.docx/.pptx/.xlsx/.html/.epub`。
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可借鉴点:
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- parser abstraction:不同 parser 都产出统一 `ParsedDocument`。
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- chunk contract:`EnrichedChunk` 持有 `source_file/document_id/page_no/heading_path/contextualized/images/tables`。
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- retrieval result:source card 展示文件名、页码、标题路径、相关性分数。
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- citation UI:答案内 citation badge 与 source card 分开,但共享同一 citation model。
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不直接照搬点:
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- NexusRAG 的引用 ID / source card 是产品层 contract,不代表其 DOCX 一定有比 LightRAG 更强的源文档坐标。
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- MNote 已选 LightRAG 作为默认 provider,不能为了 citation UI 整套替换 RAG provider。
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- MNote 的 open-reference 必须回到 local-folder resource tab / Page Aggregate / Resource Tree,不应引入第二套文档 viewer 真相。
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## 3. 设计原则
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1. LightRAG 负责检索质量:parse、chunk、vector、graph、rerank、query。
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2. MNote 负责来源真相:source registry、权限、root-relative path、resource tab 打开、citation URL、locator 降级语义。
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3. 引用定位按精度分层,不伪造:
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- `bbox`:有 page + bbox,可精确高亮。
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- `paragraph`:有 block / heading / context,可滚动到段落并高亮上下文。
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- `file`:只能打开文件。
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4. DOCX 默认先做 paragraph locator,不把 DOCX 强制转换成 PDF viewer 管线。
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5. rerank 只走 LightRAG provider。MNote 可以做 source scope post-filter 和 citation ranking,但不能把它包装成 provider rerank。
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6. Agent final answer 只能引用 MNote 过滤和映射后的 `citations/references`,不能引用 raw LightRAG chunks。
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## 4. 目标架构
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```text
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LightRAG /query/data
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-> raw.data.references / raw.data.chunks
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-> MNote source registry
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-> Evidence Mapping Layer
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- match provider file_path/doc_id -> source entry
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- match chunk_id/content/query -> sidecar block
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- classify locatorPrecision
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- build citationUrl/citationMarkdown
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-> knowledge-rag result
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- references[]
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- citations[]
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- raw kept for diagnostics only
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-> Page AI / Search UI / Source Card
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-> resource tab open-reference
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- bbox: page + bbox highlight
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- paragraph: block/context anchor highlight
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- file: file-level open
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```
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## 5. 数据合同
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### 5.1 MNote citation model
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新增内部规范,不要求一次性改完所有 API 字段,但 `knowledge-rag`、Page AI、搜索结果和 source card 应逐步收口到这组字段。
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```rust
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#[derive(Debug, Clone, Serialize, Deserialize)]
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#[serde(rename_all = "camelCase")]
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pub struct KnowledgeRagCitation {
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pub schema: String,
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pub provider: String,
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pub citation_id: String,
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pub source_id: Option<String>,
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pub source_path: String,
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pub source_root_relative_path: String,
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pub light_rag_doc_id: Option<String>,
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pub light_rag_file_path: String,
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pub light_rag_chunk_id: Option<String>,
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pub block_id: Option<String>,
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pub heading_path: Vec<String>,
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pub quote: Option<String>,
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pub quote_source: String,
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pub locator_precision: LocatorPrecision,
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pub locator_degraded: bool,
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pub citation_url: String,
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pub citation_markdown: String,
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pub relevance_score: Option<f32>,
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pub diagnostics: CitationDiagnostics,
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}
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#[derive(Debug, Clone, Serialize, Deserialize)]
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#[serde(rename_all = "camelCase")]
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pub struct CitationDiagnostics {
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pub quote_source: String,
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pub provider_rerank_requested: bool,
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pub provider_rerank_available: bool,
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pub raw_reference_mapped: bool,
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}
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#[derive(Debug, Clone, Serialize, Deserialize)]
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#[serde(rename_all = "snake_case")]
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pub enum LocatorPrecision {
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Bbox,
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Paragraph,
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File,
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}
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```
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### 5.2 citation ID
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采用 NexusRAG 式短 ID,但 ID 只作为 UI/display contract,不作为事实主键。
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格式:
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```text
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[a3z1] 普通文本来源
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[IMG-p4f2] 图片来源
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```
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生成规则:
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- 每次 query result 内稳定即可,不要求跨 query 永久稳定。
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- 基于 `provider + source_id + chunk_id/block_id + occurrence_index` 做 hash,base36/base62 截断 4 字符。
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- 同一 query 内冲突则加 salt 重算。
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- citation card 使用 `citation_id` 关联 answer badge。
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### 5.3 locator precision 计算
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```rust
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fn locator_precision_from_block(block: &serde_json::Value) -> LocatorPrecision {
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let has_bbox = block
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.get("positions")
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.and_then(|value| value.as_array())
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.is_some_and(|positions| {
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positions.iter().any(|position| {
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position.get("type").and_then(|value| value.as_str()) == Some("bbox")
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&& position.get("anchor").is_some()
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&& position.get("range").and_then(|value| value.as_array()).is_some()
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})
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});
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if has_bbox {
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return LocatorPrecision::Bbox;
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}
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let has_paragraph_anchor = block.get("blockid").and_then(|value| value.as_str()).is_some()
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|| block.get("heading").and_then(|value| value.as_str()).is_some()
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|| block
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.get("positions")
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.and_then(|value| value.as_array())
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.is_some_and(|positions| {
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positions.iter().any(|position| {
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position.get("type").and_then(|value| value.as_str()) == Some("paraid")
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})
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});
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if has_paragraph_anchor {
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return LocatorPrecision::Paragraph;
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}
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LocatorPrecision::File
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}
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```
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## 6. DOCX paragraph locator
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### 6.1 后端 locator
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当 sidecar block 命中但没有 bbox:
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```json
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{
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"locatorPrecision": "paragraph",
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"locatorDegraded": true,
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"locator": {
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"resourceKind": "office",
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"resourcePath": "资料/保护基.docx",
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"blockId": "2844bf0675454eb5e83f97b596866e53",
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"sourceMapPath": ".mnote/.../__parsed__/保护基.blocks.jsonl",
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"openAction": {
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"params": {
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"provider": "lightrag",
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"chunkId": "doc-xxx-chunk-001",
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"searchQuery": "三乙基硅",
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"evidenceText": "query-centered chunk/block context"
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}
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}
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}
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}
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```
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要求:
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- 有 `blockid` 必须传 `blockId`。
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- 有 sidecar path 必须传 `sourceMapPath`。
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- `evidenceText` 优先取 sidecar block content 的 query-centered window,其次 chunk content。
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- `page/bbox` 缺失时不得写假值。
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- `citationMarkdown` 文案可带“定位降级”,但链接仍应可点击打开 resource tab。
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### 6.2 前端 office-preview anchor
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office-preview / docx-preview 收到 paragraph locator 后:
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```text
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locator.evidenceText
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-> normalize text
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-> build anchors:
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1. query-centered phrase
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2. long rare terms
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3. heading + quote window
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4. fallback query
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-> scan rendered paragraphs / table cells
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-> score by token overlap + rare term bonus + heading match
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-> scroll into view + transient highlight
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```
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禁止:
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- 只用 query 短词直接 `find()`,否则 `吡咯烷` 容易错跳到 `N-甲基吡咯烷酮`。
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- DOCX 无 page/bbox 时展示成精确页码。
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- 同一 resource tab 重新加载整个 document 来响应每次 citation click;应优先 postMessage 更新 locator。
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|
## 7. Rerank 对齐
|
|||
|
|
|
|||
|
|
### 7.1 配置策略
|
|||
|
|
|
|||
|
|
MNote 不实现 rerank model 调用,只管理 LightRAG 配置状态。
|
|||
|
|
|
|||
|
|
推荐配置优先级:
|
|||
|
|
|
|||
|
|
1. 用户显式关闭:`enable_rerank=false`。
|
|||
|
|
2. LightRAG health 显示 `configuration.enable_rerank=true` 且 `rerank_queue_status.available=true`:MNote query 默认传 `enable_rerank=true`。
|
|||
|
|
3. LightRAG health 显示 rerank 不可用:MNote 仍可传 `enable_rerank=true`,但 diagnostics 标注 provider 未配置;或在 UI 选择“禁用 rerank”后传 false。
|
|||
|
|
|
|||
|
|
`.env` 示例:
|
|||
|
|
|
|||
|
|
```env
|
|||
|
|
RERANK_BINDING=cohere
|
|||
|
|
RERANK_MODEL=BAAI/bge-reranker-v2-m3
|
|||
|
|
RERANK_BINDING_HOST=http://127.0.0.1:8000/rerank
|
|||
|
|
RERANK_BINDING_API_KEY=local-rerank
|
|||
|
|
RERANK_BY_DEFAULT=True
|
|||
|
|
MIN_RERANK_SCORE=0.0
|
|||
|
|
MAX_ASYNC_RERANK=4
|
|||
|
|
RERANK_TIMEOUT=30
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
说明:
|
|||
|
|
|
|||
|
|
- 本地 vLLM / rerank 服务必须先真实验证 endpoint。
|
|||
|
|
- 之前本机测过常见 NVIDIA rerank endpoint 返回 404;不能仅凭模型名就标“rerank 已启用”。
|
|||
|
|
- rerank 是 query-time 能力,启用后不要求重建 LightRAG 索引。
|
|||
|
|
|
|||
|
|
### 7.2 MNote query request
|
|||
|
|
|
|||
|
|
`/api/knowledge-rag/query` 和 `/api/knowledge-rag/search` 请求 LightRAG 时应显式传:
|
|||
|
|
|
|||
|
|
```json
|
|||
|
|
{
|
|||
|
|
"query": "...",
|
|||
|
|
"mode": "mix",
|
|||
|
|
"top_k": 20,
|
|||
|
|
"chunk_top_k": 20,
|
|||
|
|
"include_references": true,
|
|||
|
|
"include_chunk_content": true,
|
|||
|
|
"enable_rerank": true
|
|||
|
|
}
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
`enable_rerank` 来源:
|
|||
|
|
|
|||
|
|
- API body 可传。
|
|||
|
|
- UI 设置可覆盖。
|
|||
|
|
- 未设置时使用 MNote 从 LightRAG health 缓存到的 provider capability。
|
|||
|
|
|
|||
|
|
### 7.3 UI diagnostics
|
|||
|
|
|
|||
|
|
资料库设置 / dashboard 显示:
|
|||
|
|
|
|||
|
|
```text
|
|||
|
|
LightRAG: healthy
|
|||
|
|
Embedding: nvidia/baai/bge-m3
|
|||
|
|
Rerank: disabled
|
|||
|
|
Rerank binding: null
|
|||
|
|
Rerank queue: unavailable
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
当用户看到检索排序异常时,第一屏就能判断当前没有 rerank。
|
|||
|
|
|
|||
|
|
## 8. Source card 与 answer citation
|
|||
|
|
|
|||
|
|
借鉴 NexusRAG 的 UI contract:
|
|||
|
|
|
|||
|
|
### 8.1 inline badge
|
|||
|
|
|
|||
|
|
答案文本中使用短 badge:
|
|||
|
|
|
|||
|
|
```text
|
|||
|
|
三乙基硅基通常可作为保护基使用 [a3z1]。
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
规则:
|
|||
|
|
|
|||
|
|
- 每句话最多 3 个来源。
|
|||
|
|
- 只引用直接支持该句的来源。
|
|||
|
|
- badge 点击打开对应 source card,同时可直接打开 citation URL。
|
|||
|
|
- LLM 不自行编造 citation ID;由 MNote tool result 提供可用 citation set。
|
|||
|
|
|
|||
|
|
### 8.2 source card
|
|||
|
|
|
|||
|
|
每个 citation card 展示:
|
|||
|
|
|
|||
|
|
```text
|
|||
|
|
[a3z1] 保护基.docx
|
|||
|
|
定位:段落级
|
|||
|
|
标题路径:酚羟基保护 > 硅基保护
|
|||
|
|
相关性:LightRAG rerank_score / vector order / MNote score
|
|||
|
|
引用片段:...
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
字段来源:
|
|||
|
|
|
|||
|
|
- 文件名:source registry。
|
|||
|
|
- 页码:只有 locator 有 page 时显示。
|
|||
|
|
- 标题路径:sidecar `parent_headings + heading`。
|
|||
|
|
- 相关性:
|
|||
|
|
- 优先 LightRAG `rerank_score`,如果 provider 返回。
|
|||
|
|
- 否则使用 MNote 现有 reference ranking score,标注为 `mnoteScore`。
|
|||
|
|
- 图片引用:sidecar drawings / image OCR 命中使用 `[IMG-xxxx]`。
|
|||
|
|
|
|||
|
|
## 9. 实施阶段
|
|||
|
|
|
|||
|
|
### Phase A:rerank capability 透出
|
|||
|
|
|
|||
|
|
- [ ] `KnowledgeRagQueryRequest` / `KnowledgeRagSearchRequest` 增加 `enable_rerank`。
|
|||
|
|
- [ ] 调 LightRAG `/query/data` / `/query/search` 时显式传 `enable_rerank`。
|
|||
|
|
- [ ] status/dashboard 暴露 LightRAG health 中的 rerank 字段。
|
|||
|
|
- [ ] diagnostics 标注 `providerRerankEnabled`、`providerRerankAvailable`、`rerankModel`。
|
|||
|
|
- [ ] 不新增 MNote reranker。
|
|||
|
|
|
|||
|
|
验收:
|
|||
|
|
|
|||
|
|
- LightRAG `.env` 为 `RERANK_BINDING=null` 时,UI 明确显示 rerank disabled。
|
|||
|
|
- API result metadata 能看出本次 query 是否请求 rerank、provider 是否实际可用。
|
|||
|
|
|
|||
|
|
### Phase B:citation contract 收口
|
|||
|
|
|
|||
|
|
- [ ] 在 knowledge-rag mapped reference 上补 `citationId`。
|
|||
|
|
- [ ] 输出统一 `citations[]`,字段包含 `citationMarkdown/citationUrl/locatorPrecision/quote/headingPath`。
|
|||
|
|
- [ ] Page AI / Hermes tool result 只暴露 filtered citations,不暴露 raw chunks 给 final answer 引用。
|
|||
|
|
- [ ] source card 消费 `citations[]`,不重新解析 raw LightRAG response。
|
|||
|
|
|
|||
|
|
验收:
|
|||
|
|
|
|||
|
|
- 同一回答内 citation badge 能映射到 source card。
|
|||
|
|
- unmapped / stale / deleted provider reference 不进入可引用 citation set。
|
|||
|
|
|
|||
|
|
### Phase C:DOCX paragraph locator
|
|||
|
|
|
|||
|
|
- [ ] `lightrag_locator_for_reference(...)` 对 DOCX sidecar block 无 bbox 时返回 paragraph locator。
|
|||
|
|
- [ ] `locatorPrecision=paragraph` 时保留 `blockId/sourceMapPath/evidenceText/headingPath`。
|
|||
|
|
- [ ] `citationMarkdown` 对 paragraph/file 降级文案明确,但链接可点击。
|
|||
|
|
- [ ] office-preview 支持 `blockId/evidenceText` 定位,按 chunk context 打分滚动。
|
|||
|
|
- [ ] 同一 DOCX 多次点击 citation 使用 postMessage 更新定位,不重复 reload。
|
|||
|
|
|
|||
|
|
验收:
|
|||
|
|
|
|||
|
|
- `吡咯烷` 不错跳到仅短词匹配的其他段落。
|
|||
|
|
- `三乙基硅` / `三甲基硅` 在 DOCX 无 bbox 时至少段落级定位。
|
|||
|
|
- 无 sidecar 或 quote 不匹配时只返回 file locator,不伪造 paragraph。
|
|||
|
|
|
|||
|
|
### Phase D:NexusRAG 式来源卡片
|
|||
|
|
|
|||
|
|
- [ ] source card 展示 citation ID、文件名、标题路径、定位精度、相关性、quote。
|
|||
|
|
- [ ] 有 page/bbox 时显示页码;无 page/bbox 不显示页码。
|
|||
|
|
- [ ] 图片 citation 使用 `[IMG-xxxx]` 并打开原图 / PDF 页。
|
|||
|
|
- [ ] answer renderer 对 citation badge 做点击联动。
|
|||
|
|
|
|||
|
|
验收:
|
|||
|
|
|
|||
|
|
- 答案和搜索结果都能从同一 citation model 打开来源。
|
|||
|
|
- source card 不依赖 LLM 生成的自由文本解析。
|
|||
|
|
|
|||
|
|
## 10. 测试计划
|
|||
|
|
|
|||
|
|
### Rust 单测
|
|||
|
|
|
|||
|
|
目标文件:`rust/crates/mnote-web/src/routes/knowledge_rag.rs`
|
|||
|
|
|
|||
|
|
- `mapped_reference_generates_short_citation_id`
|
|||
|
|
- `docx_paraid_block_returns_paragraph_locator`
|
|||
|
|
- `docx_missing_block_degrades_to_file_locator`
|
|||
|
|
- `bbox_block_keeps_bbox_locator`
|
|||
|
|
- `query_request_passes_enable_rerank`
|
|||
|
|
- `provider_rerank_disabled_is_reported_in_diagnostics`
|
|||
|
|
|
|||
|
|
### Browser smoke
|
|||
|
|
|
|||
|
|
新增或扩展:
|
|||
|
|
|
|||
|
|
- `scripts/task540-knowledge-rag-office-result-open-locator-smoke.js`
|
|||
|
|
- `scripts/task543-knowledge-rag-pyrrolidine-top5-locator-smoke.js`
|
|||
|
|
|
|||
|
|
新增断言:
|
|||
|
|
|
|||
|
|
- DOCX citation click 后 resource tab 不重载。
|
|||
|
|
- paragraph locator 触发可见高亮。
|
|||
|
|
- `locatorPrecision` 与 UI 文案一致。
|
|||
|
|
- rerank disabled 状态在资料库设置中可见。
|
|||
|
|
|
|||
|
|
### Provider smoke
|
|||
|
|
|
|||
|
|
只在配置真实 rerank endpoint 后执行:
|
|||
|
|
|
|||
|
|
```bash
|
|||
|
|
curl /health
|
|||
|
|
curl /query/data -d '{"query":"...", "mode":"mix", "enable_rerank":true}'
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
验收:
|
|||
|
|
|
|||
|
|
- `/health.configuration.enable_rerank=true`。
|
|||
|
|
- `rerank_queue_status.available=true`。
|
|||
|
|
- query 日志出现 rerank 成功或 result chunk 带 `rerank_score`。
|
|||
|
|
|
|||
|
|
## 11. 不做
|
|||
|
|
|
|||
|
|
- 不替换 LightRAG 为 NexusRAG。
|
|||
|
|
- 不在 MNote 复制 LightRAG vector / graph / rerank。
|
|||
|
|
- 不把 DOCX 无 page/bbox 的命中伪造成 PDF 精确定位。
|
|||
|
|
- 不让普通本地搜索强依赖 LightRAG。
|
|||
|
|
- 不让 LLM 自己生成 citation ID。
|
|||
|
|
- 不把 raw LightRAG chunk 暴露为 agent final answer 可直接引用材料。
|
|||
|
|
|
|||
|
|
## 12. 开放问题
|
|||
|
|
|
|||
|
|
1. LightRAG `/query/data` 当前 `convert_to_user_format(...)` 没有把 `rerank_score` 放入 `formatted_chunks`。如果上游 rerank 已经写回 chunk,是否要向 LightRAG 提 patch 暴露 `rerank_score`,还是 MNote 只显示本地 ranking score?
|
|||
|
|
2. DOCX `paraid range=[null,null]` 的样本较多。是否需要在 LightRAG native parser 侧增强 paraId 恢复或写入 block ordinal,给 MNote 一个更稳定的 `blockOrder`?
|
|||
|
|
3. `/query/search` 与 `/query/data` 的 reference schema 不完全一致时,MNote 是否应该先在 connector 层 normalize 为同一个 `ProviderReference`?
|
|||
|
|
4. Source scope 当前仍是 MNote post-filter。长期是否需要 LightRAG provider 支持按 `file_path/doc_id` 过滤候选,以避免 raw retrieval 污染?
|