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arXiv 2102.11389cs.DBcs.AI
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近似知识图谱查询分类:从排序到二分分类

Approximate Knowledge Graph Query Answering: From Ranking to Binary Classification

Vrije Universiteit Amsterdam(阿姆斯特丹自由大学);University of Amsterdam(阿姆斯特丹大学);Leiden University(莱顿大学);Discovery Lab, Elsevier(爱思唯尔发现实验室)

Ruud van Bakel, Teodor Aleksiev, Daniel Daza, Dimitrios Alivanistos, Michael Cochez

摘要:

大型异构数据集的特点是信息缺失甚至错误。当它们是社区努力的产物或从外部来源(如文本)自动提取事实的方法时,这一点更加明显。在知识图谱中可以看到上述现象的特殊情况,其中这主要以缺失或不正确的边和节点的形式出现。对这种不完整图的结构化查询将导致不完整的答案集,即使正确的实体存在于图中,因为匹配模式所需的一个或多个边丢失。为了克服这个问题,已经提出了几种近似结构化查询应答算法。受现代信息检索度量的启发,这些算法产生图中所有实体的排名,并且基于正确答案在该排名中出现的高度来进一步评估它们的性能。在这项工作中,我们采取批判性的眼光在这种方式的评价。我们认为,执行基于排名的评估是不够的,以评估复杂的查询回答的方法。为了解决这个问题,我们引入了消息传递查询框(MPQB),它需要二进制分类指标重新投入使用,并显示了这对最近提出的查询嵌入方法MPQE的影响。

英文摘要:

Large, heterogeneous datasets are characterized by missing or even erroneous information. This is more evident when they are the product of community effort or automatic fact extraction methods from external sources, such as text. A special case of the aforementioned phenomenon can be seen in knowledge graphs, where this mostly appears in the form of missing or incorrect edges and nodes. Structured querying on such incomplete graphs will result in incomplete sets of answers, even if the correct entities exist in the graph, since one or more edges needed to match the pattern are missing. To overcome this problem, several algorithms for approximate structured query answering have been proposed. Inspired by modern Information Retrieval metrics, these algorithms produce a ranking of all entities in the graph, and their performance is further evaluated based on how high in this ranking the correct answers appear. In this work we take a critical look at this way of evaluation. We argue that performing a ranking-based evaluation is not sufficient to assess methods for complex query answering. To solve this, we introduce Message Passing Query Boxes (MPQB), which takes binary classification metrics back into use and shows the effect this has on the recently proposed query embedding method MPQE.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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