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arXiv 1807.01801cs.AI
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三重模式查询中的实体重构

Feature-based reformulation of entities in triple pattern queries

Rensselaer Polytechnic Institute(伦斯勒理工学院);IBM Research(IBM研究院)

Amar Viswanathan, Geeth de Mel, James A. Hendler

摘要:

知识图谱通过关系将唯一可识别的实体编码为其他实体或文字值,从而实现对所存储的数据的语义丰富的查询。通常,这种查询的语义通常是明确的,从而导致明确的答案。查询日志统计表明,大多数向知识图谱发出的查询通常是以实体为中心的查询。当用户需要额外的答案时,最先进的辅助用户的方法是重写原始查询,从而得到一组近似值。过去已经提出了几种策略来解决这个问题。它们通常在分类法中向上移动,将特定元素放宽为更通用的元素。实体没有分类法,它们最终被泛化。为了解决这个问题,在本文中,我们提出了一个以实体为中心的重构策略,利用模式信息和实体的功能,在图中建议重写。一旦特征被识别,所关注的实体就被重新表述为一组特征。由于实体可以有大量的功能,我们引入的策略,选择前k个最相关的和{信息排名的功能,并将它们增加到原始查询,以创建一个有效的重构。然后,我们评估我们的方法表明,我们的重新制定战略产生的结果是更翔实的国家相比,最先进的

英文摘要:

Knowledge graphs encode uniquely identifiable entities to other entities or literal values by means of relationships, thus enabling semantically rich querying over the stored data. Typically, the semantics of such queries are often crisp thereby resulting in crisp answers. Query log statistics show that a majority of the queries issued to knowledge graphs are often entity centric queries. When a user needs additional answers the state-of-the-art in assisting users is to rewrite the original query resulting in a set of approximations. Several strategies have been proposed in past to address this. They typically move up the taxonomy to relax a specific element to a more generic element. Entities don't have a taxonomy and they end up being generalized. To address this issue, in this paper, we propose an entity centric reformulation strategy that utilizes schema information and entity features present in the graph to suggest rewrites. Once the features are identified, the entity in concern is reformulated as a set of features. Since entities can have a large number of features, we introduce strategies that select the top-k most relevant and {informative ranked features and augment them to the original query to create a valid reformulation. We then evaluate our approach by showing that our reformulation strategy produces results that are more informative when compared with state-of-the-art

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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