论文标题
带基于Xquery的过滤的SPARQL
SPARQL with XQuery-based Filtering
论文作者
论文摘要
链接的开放数据（LOD）已在各个域上增殖，但是，除了RDF之外，仍然有许多开放数据，RDF是LOD中的标准数据说明框架。当这些开放数据与URI相关联时，也可以将其连接到LOD中的实体。以文档为中心的XML数据是这样的开放数据，这些数据与LOD中的实体连接为这些实体的补充文档，并将这些XML数据转换为RDF，需要各种技术，例如信息提取，本体论设计和本体学映射，并用人类的先验知识进行映射。为了利用来自LOD实体链接的以文档为中心的XML数据，在本文中，提出了基于SPARQL的无缝访问方法和XML数据。特别是，提出了Sparql，XqueryFilter的扩展名，该扩展可以在Sparql中作为extrip xquery。为了有效地查询SPARQL和XQUERY的组合，提出了基于数据库理论的查询优化。本文基于现实世界的实验表明，XqueryFilter的有效性和优化效率。
Linked Open Data (LOD) has been proliferated over various domains, however, there are still lots of open data in various format other than RDF, a standard data description framework in LOD. These open data can also be connected to entities in LOD when they are associated with URIs. Document-centric XML data are such open data that are connected with entities in LOD as supplemental documents for these entities, and to convert these XML data into RDF requires various techniques such as information extraction, ontology design and ontology mapping with human prior knowledge. To utilize document-centric XML data linked from entities in LOD, in this paper, a SPARQL-based seamless access method on RDF and XML data is proposed. In particular, an extension to SPARQL, XQueryFILTER, which enables XQuery as a filter in SPARQL is proposed. For efficient query processing of the combination of SPARQL and XQuery, a database theory-based query optimization is proposed. Real-world scenario-based experiments in this paper showcase that effectiveness of XQueryFILTER and efficiency of the optimization.
