tailieunhanh - Lecture Introduction to XML: What is XML?

After completing this unit, you should be able to: Describe the basic rules of XML, describe what it means for an XML document to be well-formed, list the components that make up an XML document, differentiate between XML and HTML, describe the internationalization support in XML, define some best practices for XML. | Welcome to What Is XML Copyright IBM Corporation 2004 Course materials may not be reproduced in whole or in part without the prior written Unit Objectives After completing this unit you should be able to Describe the basic rules of XML Describe what it means for an XML document to be well-formed List the components that make up an XML document Differentiate between XML and HTML Describe the internationalization support in XML Define some best practices for XML Copyright IBM Corporation 2004 What Is XML At its core XML is text formatted to follow a well-defined set of rules. XML documents consist primarily of tags and text. - If you ve ever seen the source to an HTML document then the XML structure should look familiar This text may be stored represented in -A normal file stored on disk -A message being sent over HTTP -A character string in a programming language -A CLOB character large object in a database -Any other way textual data can be used XML documents do not need to exist as documents --they may be - Byte streams sent between applications - Fields in a database record -Collections of XML Infoset information items - For simplicity they will be referred to as though they are documents and files. Copyright IBM Corporation .