"XML How to Program"

EBook Description: Welcome to the exciting world of XML! This book is by an old guy and four young guys. The old guy (HMD; Massachusetts Institute of Technology 1967) has been programming and/or teaching programming for 40 years. The four young guys (PJD; MIT 1991, TRN; MIT 1992, TML; Carnegie Mellon 2001, PS; Northeastern 2000) have each been programming and/or teaching programming for many years. The old guy programs and teaches from experience; the young guys do so from an inexhaustible reserve of energy. The old guy wants clarity; the young guys want performance. The old guy seeks elegance and beauty; the young guys want results. We got together to produce a book we hope you will find informative, challenging and entertaining. Today, XML is arguably the hottest technology in the computer industry. Therefore, university professors are eager to incorporate XML into their undergraduate and graduate Internet, Web, e-business and e-commerce curricula. Professionals are eager to use XML in their industrial-strength information-technology applications. Students are highly motivated by the fact that they are learning a leading-edge technology (XML) that will be immediately useful to them as they leave the university environment and head into a world where the Internet and World Wide Web have a massive prominence.

Buchtipp! Die ersten drei Teile des Buchs f�hren in die Thematik PHP, MySQL und XML ein und bieten zus�tzliche Verweise sowie Vor- und R�ckgriffe. Das erlernte Wissen ist dann im vierten Teil gefragt: im praktischen Workshop kommen alle Elemente zum Zuge. Hier zeigt sich, dass sich das Flash-Format mittlerweile nicht nur zur Darstellung von Animationen und Comics eignet, sondern auch f�r komplexe Infografiken und datenbankgest�tzte Anwendungen.

Relational & XML Data Exchange

Data exchange is the problem of finding an instance of a target schema, given an instance of a source schema and a specification of the relationship between the source and the target. Such a target instance should correctly represent information from the source instance under the constraints imposed by the target schema, and it should allow one to evaluate queries on the target instance in a way that is semantically consistent with the source data. Data exchange is an old problem that re-emerged as an active research topic recently, due to the increased need for exchange of data in various formats, often in e-business applications. In this lecture, we give an overview of the basic concepts of data exchange in both relational and XML contexts.
We give examples of data exchange problems, and we introduce the main tasks that need to addressed. We then discuss relational data exchange, concentrating on issues such as relational schema mappings, materializing target instances (including canonical solutions and cores), query answering, and query rewriting. After that, we discuss metadata management, i.e., handling schema mappings themselves. We pay particular attention to operations on schema mappings, such as composition and inverse. Finally, we describe both data exchange and metadata management in the context of XML. We use mappings based on transforming tree patterns, and we show that they lead to a host of new problems that did not arise in the relational case, but they need to be addressed for XML. These include consistency issues for mappings and schemas, as well as imposing tighter restrictions on mappings and queries to achieve tractable query answering in data exchange.

Relational and XML Data Exchange

Data exchange is the problem of finding an instance of a target schema, given an instance of a source schema and a specification of the relationship between the source and the target. Such a target instance should correctly represent information from the source instance under the constraints imposed by the target schema, and it should allow one to evaluate queries on the target instance in a way that is semantically consistent with the source data. Data exchange is an old problem that re-emerged as an active research topic recently, due to the increased need for exchange of data in various formats, often in e-business applications. In this lecture, we give an overview of the basic concepts of data exchange in both relational and XML contexts.

We give examples of data exchange problems, and we introduce the main tasks that need to addressed. We then discuss relational data exchange, concentrating on issues such as relational schema mappings, materializing target instances (including canonical solutions and cores), query answering, and query rewriting. After that, we discuss metadata management, i.e., handling schema mappings themselves. We pay particular attention to operations on schema mappings, such as composition and inverse. Finally, we describe both data exchange and metadata management in the context of XML. We use mappings based on transforming tree patterns, and we show that they lead to a host of new problems that did not arise in the relational case, but they need to be addressed for XML. These include consistency issues for mappings and schemas, as well as imposing tighter restrictions on mappings and queries to achieve tractable query answering in data exchange.

Pro PHP XML and Web Services

Pro PHP XML and Web Services

XML and PHP

XML and PHP by Vikram Vaswani

• Free IAS eBooks
• Free GRE eBooks
• Free MBA eBooks
• Free GATE eBooks