{
    "summary": [
        {
            "name": "entity_relations",
            "title": "实体关系",
            "primary": ["id"]
        }
    ],
    "fields": [
        {"name": "id", "title": "ID", "type": "str", "length": 32},
        {"name": "kb_id", "title": "知识库ID", "type": "str", "length": 32},
        {"name": "subject_id", "title": "主体实体ID", "type": "str", "length": 32},
        {"name": "object_id", "title": "客体实体ID", "type": "str", "length": 32},
        {"name": "relation_type", "title": "关系类型", "type": "str", "length": 64},
        {"name": "description", "title": "关系描述", "type": "text", "length": 2000},
        {"name": "graph_edge_id", "title": "图边ID", "type": "str", "length": 128},
        {"name": "source_chunk_ids", "title": "来源分片ID列表", "type": "text", "length": 2000},
        {"name": "org_id", "title": "所属机构", "type": "str", "length": 32},
        {"name": "created_at", "title": "创建时间", "type": "datetime"}
    ],
    "codes": [
        {"field": "kb_id", "table": "knowledge_bases", "valuefield": "id", "textfield": "name"}
    ],
    "indexes": [
        {"name": "idx_rel_kb", "idxtype": "index", "idxfields": ["kb_id"]},
        {"name": "idx_rel_subject", "idxtype": "index", "idxfields": ["subject_id"]},
        {"name": "idx_rel_object", "idxtype": "index", "idxfields": ["object_id"]}
    ]
}