Reasoning About XML Schema Mappings in the Presence of Key Constraints and Value Dependencies

Pankowski, Tadeusz; Cybulka, Jolanta; Meissner, Adam

doi:10.1007/978-3-540-72982-2_35

Cited by 8 publications

(3 citation statements)

References 5 publications

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“…In this paper an XML schema (a schema for short) will be understood as a tree-pattern formula [3,17,16,21]. Schemas will be used to specify structures of XML trees.…”

Section: Xml Schemas and Instancesmentioning

confidence: 99%

XML data integration in SixP2P

Pankowski

2008

Proceedings of the 2008 International Workshop on Data Management in Peer-to-Peer Systems

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In the paper we discuss the problem of data integration in a P2P environment. In such setting each peer stores schema of its local data, mappings between the schema and schemas of some other peers (peer's partners), and schema constraints. The goal of the integration is to answer queries formulated against arbitrarily chosen peers. The answer consists of data stored in the queried peer as well as data of its direct and indirect partners. We focus on defining and using mappings, schema constraints, query propagation across the P2P system, and query reformulation in such scenario. A special attention is paid to discovering missing values using schema constraints and to reconcile inconsistent data using reliability levels assigning to the sources of data. The discussed approach has been implemented in SixP2P system (Semantic Integration of XML data in P2P environment).

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“…In this paper an XML schema (a schema for short) will be understood as a tree-pattern formula [3,17,16,21]. Schemas will be used to specify structures of XML trees.…”

Section: Xml Schemas and Instancesmentioning

confidence: 99%

XML data integration in SixP2P

Pankowski

2008

Proceedings of the 2008 International Workshop on Data Management in Peer-to-Peer Systems

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“…After obtaining the matching results, further processing is needed to translate these correspondences to executable scripts (e.g., SQL, XQuery). Some existing works (Atay, Chebotko, Lu, & Fotouhi, 2007;Fuxman et al, 2006;Hernández et al, 2007;Hernández et al, 2008;Pankowski, Cybulka, & Meissner, 2007;Popa, Velegrakis, Miller, Hernández, & Fagin, 2002) call these scripts mappings and call this process mapping generation. In order to distinguish the results of the basic matching operation and this one, we call the results of this operation mapping rules and call this operation mapping rule generation.…”

Section: Matching and Mappingmentioning

confidence: 99%

“…Attempts to automatically generate mapping rules for XML schemas include (Fuxman et al, 2006;Hernández et al, 2007;Hernández et al, 2008;Popa et al, 2002;Yu & Popa, 2004) Pankowski et al (2007 discuss generation of XML schema mapping rules in the presence of key constraints and value dependencies. Atay et al (2007) present approaches to generate XML to SQL mapping rules for recursive XML schemas.…”

Section: Mapping Rule Generationmentioning

confidence: 99%

XML Data Integration

Cao

Yan

Candan

et al. 2010

Advanced Applications and Structures in XML Processing

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Many applications require exchange and integration of data from multiple, heterogeneous sources. eXtensible Markup Language (XML) is a standard developed to satisfy the convenient data exchange needs of these applications. However, XML by itself does not address the data integration requirements. This chapter discusses the challenges and techniques in XML Data Integration. It first presents a four step outline, illustrating the steps involved in the integration of XML data. This chapter, then, focuses on the first two of these steps: schema extraction and data/schema mapping. More specifically, schema extraction presents techniques to extract tree summaries, DTDs, or XML Schemas from XML documents. The discussion on data/schema mapping focuses on techniques for aligning XML data and schemas.

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