为返回数据源中与查询目标节点相似的节点，首先提取出数据源中长度在固定范围内的所有路径，然后利用关系数据库系统将其与查询路径进行相似性连接，并按相似度从大到小返回所有结果。

To get the source nodes similar to the target query node, firstly the paths whose lengths were within an interval were extracted from the data source, then a similarity join process between them and.

youdao