XWeB: the XML Warehouse Benchmark

With the emergence of XML as a standard for representing business data, new decision support applications are being developed. These XML data warehouses aim at supporting On-Line Analytical Processing (OLAP) operations that manipulate irregular XML data. To ensure feasibility of these new tools, important performance issues must be addressed. Performance is customarily assessed with the help of benchmarks. However, decision support benchmarks do not currently support XML features. In this paper, we introduce the XML Warehouse Benchmark (XWeB), which aims at filling this gap. XWeB derives from the relational decision support benchmark TPC-H. It is mainly composed of a test data warehouse that is based on a unified reference model for XML warehouses and that features XML-specific structures, and its associate XQuery decision support workload. XWeB's usage is illustrated by experiments on several XML database management systems

XML-to-SQL Query Translation Literature: The State of the Art and Open Problems

Recently, the database research literature has seen an explosion of publications with the goal of using an RDBMS to store and/or query XML data. The problems addressed and solved in this area are diverse. This diversity renders it di#cult to know how the various results presented fit together, and even makes it hard to know what open problems remain. As a first step to rectifying this situation, we present a classification of the problem space and discuss how almost 40 papers fit into this classification. As a result of this study, we find that some basic questions are still open. In particular, for the XML publishing of relational data and for "schema-based" shredding of XML documents into relations, there is no published algorithm for translating even simple path expression queries (with the // axis) into SQL when the XML schema is recursive

W eb Development : Gaming Terminal for Svenska Spel AB

Svenska Spel har en programvara för att hantera den spelterminal där kassören matar in kunders köp av spel. Denna terminal har idag sina brister och begränsningar som Svenska Spel hoppas skulle lösas med en webbaserad ersättare. Mitt examensarbete har grundats i att undersöka om denna översättning skulle vara möjlig samt vilka för och nackdelar detta skulle innebära. Rapporten hanterar därför de problem som behövs lösas för att möjliggöra en sådan implementation Hur man ska gå tillväga och vad man bör tänka på. Examensarbetet har resulterat i utveckling av en prototyp som har tillräcklig implementation för att möta specifikationskraven. I stora drag ser jag väldigt positivt på lösningen även om det finns delar att ta hänsyn till. Rapporten riktar sig främst till Svenska Spel, men också till dig som är ny inom webbapplikationsutveckling och vill ha en bra start att utgå ifrån

Logical foundations of XML and XQuery

XML is the underlying representation formalism of much web-data. Thus to reason about web-data essentially boils down to reasoning about data in XML format. In this course the students learn about the main languages for querying XML data: XPath and XQuery. The course contains both theoretical work and practical examples