1118162137 xml split 1 274

175 PART III PROCESSING CHAPTER 7 Extracting Data from XML.. 773 APPENDIX C XML Schema Data Types... In this chapter you’ve learned about the following: ➤ Much of today’s data comes i

BEGINNING XML

INTRODUCTION xxvii

 PART I INTRODUCING XML CHAPTER 1 What Is XML? 3

CHAPTER 2 Well-Formed XML 25

CHAPTER 3 XML Namespaces 53

 PART II VALIDATION CHAPTER 4 Document Type Defi nitions 83

CHAPTER 5 XML Schemas 117

CHAPTER 6 RELAX NG and Schematron 175

 PART III PROCESSING CHAPTER 7 Extracting Data from XML 211

CHAPTER 8 XSLT 239

 PART IV DATABASES CHAPTER 9 XQuery 307

CHAPTER 10 XML and Databases 341

 PART V PROGRAMMING CHAPTER 11 Event-Driven Programming 403

CHAPTER 12 LINQ to XML 451

 PART VI COMMUNICATION CHAPTER 13 RSS, Atom, and Content Syndication 485

CHAPTER 14 Web Services 539

CHAPTER 15 SOAP and WSDL 573

CHAPTER 16 AJAX 615

 PART VII DISPLAY

CHAPTER 17 XHTML and HTML 5 649

CHAPTER 18 Scalable Vector Graphics (SVG) 689

 PART VIII CASE STUDY CHAPTER 19 Case Study: XML in Publishing 727

APPENDIX A Answers to Exercises 749

APPENDIX B XPath Functions 773

APPENDIX C XML Schema Data Types 797

INDEX 811

XML

In this chapter you’ve learned about the following:

➤ Much of today’s data comes in the form of tabular data and XML combined

➤ You need a dedicated storage type for XML rather than just use a text fi eld You also need methods to extract specifi c values and fragments of XML as well as methods to create new XML formats combining the relational and XML data You will probably want the facility

to update XML documents although this is not always a necessity

➤ A relational database handles both tabular data and XML documents, whereas a native XML database is designed to cope solely with XML documents

➤ High-end systems such as Oracle and SQL Server XML have their own data type and there are suitable methods available on these types for retrieval and manipulation of the XML

➤ The features available in a native XML database include the ability to store large document collections as well as the ability to effi ciently query across these documents

EXERCISES

You can fi nd suggested answers to these questions in Appendix A

1. List the main reasons to choose a relational database with XML features over a native XML database

2. What fi ve methods are available against an XML data type? (No peeking!)

3. MySQL has only two XML-related functions If you could ask for one more feature or function, what would it be?

 WHAT YOU LEARNED IN THIS CHAPTER

Storage needs There is a big diff erence between relational data, data in a tabular

for-mat, and XML data Therefore, special mechanisms are needed to store XML within relational systems.

Essential features in

databases.

XML needs to be stored in a native format, rather than as text There must also be ways to query it for specifi c values and a way to return frag-ments of XML Ideally there should also be a way to treat XML as tabular data if possible.

Choosing an

application

Most commercial relational databases have fairly advanced XML fea-tures, particularly Oracle and SQL Server Native XML databases are designed to cope with the situation in which all data is held as XML.