钉钉 AI 客服：知识图谱构建

钉钉 AI 客服：知识图谱构建

知识图谱让 AI 更智能。

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一、知识图谱概念

实体（产品） ──关系（属于）── 实体（类别）
     │
     └──属性（价格：¥99）

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二、图谱构建

2.1 实体定义

const entities = {
  product: {
    properties: ['name', 'price', 'description']
  },
  category: {
    properties: ['name', 'description']
  },
  faq: {
    properties: ['question', 'answer']
  }
};

2.2 关系定义

const relations = [
  { from: 'product', to: 'category', name: 'belongs_to' },
  { from: 'product', to: 'faq', name: 'has_faq' },
  { from: 'category', to: 'category', name: 'parent_of' }
];

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三、图谱存储

3.1 Neo4j

const neo4j = require('neo4j-driver');
const driver = neo4j.driver('bolt://localhost', neo4j.auth.basic('user', 'pass'));

// 创建实体
async function createProduct(product) {
  const session = driver.session();
  await session.run(
    'CREATE (p:Product {name: $name, price: $price})',
    product
  );
  session.close();
}

// 创建关系
async function createRelation(fromId, toId, relation) {
  const session = driver.session();
  await session.run(
    `MATCH (a {id: $fromId}), (b {id: $toId}) CREATE (a)-[r:${relation}]->(b)`
    , { fromId, toId }
  );
  session.close();
}

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四、图谱查询

// 查询产品及其 FAQ
async function getProductWithFAQs(productId) {
  const session = driver.session();
  const result = await session.run(
    `MATCH (p:Product {id: $id})-[:has_faq]->(f:FAQ)
     RETURN p, f`
    , { id: productId }
  );
  session.close();
  return result.records;
}

// 推荐相关产品
async function getRelatedProducts(productId) {
  const session = driver.session();
  const result = await session.run(
    `MATCH (p:Product {id: $id})-[:belongs_to]->(c:Category)<-[:belongs_to]-(other:Product)
     RETURN other LIMIT 5`
    , { id: productId }
  );
  session.close();
  return result.records;
}

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五、图谱推理

// 推理用户问题
async function reason(question) {
  // 识别实体
  const entity = await extractEntity(question);
  
  // 查询关联
  const related = await queryRelated(entity);
  
  // 推理答案
  const answer = await generateAnswer(entity, related);
  
  return answer;
}

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六、图谱更新

async function updateGraph(changes) {
  for (const change of changes) {
    if (change.type === 'add_entity') {
      await createEntity(change.data);
    } else if (change.type === 'add_relation') {
      await createRelation(change.from, change.to, change.relation);
    }
  }
}

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七、效果评估

指标	无图谱	有图谱
准确率	80%	92%
召回率	70%	88%

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项目地址：GitHub - dingtalk-connector-pro 有问题欢迎 Issue 或评论区交流