arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.14552cs.DBcs.SI
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图数据库中的多维事件数据

Multi-Dimensional Event Data in Graph Databases

Stefan Esser, Dirk Fahland

摘要:

流程事件数据通常存储在顺序流程事件日志或关系数据库中。虽然事件日志的顺序、单维性质有助于基于诸如"直接/最终跟随"的时间关系来查询事件的(子)序列,但是它不支持查询多个相关实体的多维事件数据。关系数据库允许存储多维事件数据,但是现有的查询语言不支持根据时间关系查询事件的序列或路径。在本文中,我们提出了一个通用的数据模型,多维事件数据的基础上标记的属性图,允许存储结构和时间关系在一个单一的,集成的基于图的数据结构在一个系统的方式。我们为数据模型的所有概念提供了语义,并为同步和异步交互的多个实体上的事件数据建模提供了通用查询。查询允许有效地将大型现实生活中的事件数据集转换为我们的数据模型,我们提供了5个转换后的数据集供进一步研究。我们表明,典型的和先进的查询检索和聚合这样的多维事件数据可以制定和执行有效地在现有的查询语言Cypher,引起了一些新的研究问题。具体来说,我们的数据模型上的聚合查询可以使用现成的技术在多个相互关联的实体上进行流程挖掘。

英文摘要:

Process event data is usually stored either in a sequential process event log or in a relational database. While the sequential, single-dimensional nature of event logs aids querying for (sub)sequences of events based on temporal relations such as "directly/eventually-follows", it does not support querying multi-dimensional event data of multiple related entities. Relational databases allow storing multi-dimensional event data but existing query languages do not support querying for sequences or paths of events in terms of temporal relations. In this paper, we propose a general data model for multi-dimensional event data based on labeled property graphs that allows storing structural and temporal relations in a single, integrated graph-based data structure in a systematic way. We provide semantics for all concepts of our data model, and generic queries for modeling event data over multiple entities that interact synchronously and asynchronously . The queries allow for efficiently converting large real-life event data sets into our data model and we provide 5 converted data sets for further research. We show that typical and advanced queries for retrieving and aggregating such multidimensional event data can be formulated and executed efficiently in the existing query language Cypher, giving rise to several new research questions. Specifically aggregation queries on our data model enable process mining over multiple interrelated entities using off-the-shelf technology.

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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