Stuttgart, Univ., Diplomarbeit, 2006.

Stuttgart, Univ., Diplomarb., 2002.

La projection est une des techniques utilisées pour permettre de réduire les besoins en terme de taille mémoire nécessaire aux moteurs de requêtes XML (in-memory). L'idée sous-jacente à cette technique est simple : étant donnée une requête Q à évaluer sur un document XML D, au lieu de procéder sur D, la requête est évaluée sur un document D', plus petit que D, construit lors du chargement de ce dernier en mémoire, par élagage des parties de D inutiles pour Q. Le document D', est une projection du document initial D. Il est souvent de taille drastiquement inférieure à celle de D.Alors que cette technique de projection a été étudiée et développée assez largement pour l'interrogation de document XML, à notre connaissance, ce type de technique n'a pas été explorée ni appliquée aux mises à jour de documents XML.L'objet de cette thèse a donc été de proposer une technique d'optimisation de mises à jour de documents au format XML exploitant le typage des documents.La contribution a porté sur la spécification de l'algorithme Merge, c'est-à-dire la fusion des modifications avec le document initial, ainsi que sur le développement d'un prototype sur lequel des tests ont été effectués. / XML projection is one of the main adopted optimization techniques for reducing memory consumption in XQuery in-memory engines. The main idea behind this technique is quite simple: given a query Q over an XML document D, instead of evaluating Q on D, the query Q is evaluated on a smaller document D' obtained from D by pruning out, at loading-time, parts of D that are unrelevant for Q. The actual queried document D' is a projection of the original one, and is often much smaller than D due to the fact that queries tend to be quite selective in general.While projection techniques have been extensively investigated for XML querying, we are not aware of applications to XML updating.This Thesis investigates application of a projection based optimization mechanism for XQuery Update Facility expressions in the presence of a schema. The current work includes study of the method and a formal development of Merge algorithm as well as experiments testifying its effectiveness.

This master's thesis deals with problems of effective storage and querying of XML documents in A relational database. In the first part of this thesis XML and related technologies are described, with emphasis on languages for XML Schema definition and it's querying. Then an XML mapping method based on Hybrid method and XML Schema is described here. Hereafter the design and implementation of a native XML database front-end for object-relational database is described. Designed front-end allows storing and querying of XML documents into the underlying database. The last part contains results and evaluation of performance tests of the implemented system.

In the presented work we study the XML data evolution, reasons and consequences of XML schema evolution in particular. The thesis contains a survey of the existing approaches to this problem. The approach presented in this work extends the XSem conceptual model with the support for multiple versions of the model. Thanks to this extension, it is possible to define a set of changes between two versions of a schema. The thesis contains a description of an algorithm that compares two versions of a schema and produces a revalidation script in XSL.

Recently, plenty of methods dealing with automatic inference of XML schema have been developed, however, most of them utilize XML documents as their only input. In this thesis we focus on extending inference by incorporating XML operations, in particular XQuery queries. We discuss how can XQuery queries help in improving the inference process and we propose an algorithm based on chosen improvements, extending an existing method of a key discovery, that can be integrated to methods inferring so-called initial grammar. By implementing it, we created the first solution of XML schema inference using XML documents along with XML operations.

In the presented work we study XML schema evolution, its types and impact on queries which are related on the particular schema. The thesis contains a review of existing approaches of this problem. The approach presented in this work shows a possible solution how to adapt related queries while schema evolves. The thesis contains a description of an algorithm which modies queries related to the evolved schema. Finally the work contains a number of exper- iments that verify proposal of the algorithms and show their advantages and disadvantages. 1

The work is devoted to modeling of company’s financial flows using XML. Company’s financial flows have been described and their classification has been presented in the introduction. The problem of compatibility of data exchange formats has been raised. The aim of the work has been stated, as well as the problems to be solved. The XML review has been presented in Chapter 2. The main XML system components have been described. Such notions as XML data files, XML schemas, XML transformations have been explained. The structure of an XML file has been analyzed and the rules of a “well - formed” XML have been formulated. Chapter 3 deals with the possibilities of XML application in Excel 2003. One of the main notion of XML – the map notion - has been introduced. The relationship between XML maps, schemas and data files has been established. The task pane XML Source has been considered in detail. Chapter 4 deals with the problems of XML data import and export using Access 2003. The practical part of the work has been described in Chapters 5 and 6. The examples of XML maps creating in Excel 2003 has been presented in Chapter 5, as well as the procedures of XML data importing into Excel 2003 sheets. The solution of the problem of exporting of an Access 2003 table into Excel 2003 using XML is given in Chapter 6.

International Telemetering Conference Proceedings / October 18-21, 2004 / Town & Country Resort, San Diego, California / Much effort has been spent on developing physical layer standards to ease multi-vendor inter-operability. However as anyone familiar with real-life system integration knows a large gap exists in defining system configuration and set-up, not just between vendors but also between different groups on the base. Different solutions to this problem have been attempted (for example TMATS). However, the emergence of XML (eXtensible Markup Language) as a commercial standard presents a new opportunity to define a powerful and extensible tool for data-interchange between different systems. This paper introduces the self-documenting standard for information exchange that is XML. A generic model for flight test data acquisition is presented. Finally, an XML vocabulary (or schema) based on this model is proposed. This schema could form the basis for an industry wide XML standard to simplify the problem of data interchange between vendors, between programs, even between different databases in the same organisation.

ITC/USA 2011 Conference Proceedings / The Forty-Seventh Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2011 / Bally's Las Vegas, Las Vegas, Nevada / The next generation of telemetry systems will rely heavily on XML-based standards. Multiple standards are currently being developed and reviewed by the T&E community, including iNET's Metadata Description Language (MDL), the XML-version of IRIG 106, Chapter 9 (TMATS XML), the Instrumentation Hardware Abstraction Language (IHAL), and the Data Display Markup Language (DDML). In this paper, we share design considerations for developing XML-based T&E standards, gained from our experiences in designing IHAL and DDML.