XPath Tutorial - XML tutorial

Category: XML tutorials > Authoring - Difficulty:

The business services components that we will discuss in this tutorial are the components that validate the user's input. This type of component should be placed on the client whenever possible so that the user's input can be validated immediately.

XML's usage is continuing to grow quickly as both individuals and companies realize its potential. However, in many ways XML is still a relatively new technology, and many people, possibly you, are just now learning what it can do for them. Unlike some other software technologies such as HTML or even Java, XML is a little fuzzier in terms of how it is applied in different scenarios. Just as it's difficult to look at a person and grasp how their DNA makes them who they are, it can also be challenging to look at an application and get a grasp for how XML fits into the equation. This tutorial introduces you to XML and gives you some insight as to why it was created and what it can do.

The Firefox 3.0 release has support for microformats in the form of an API that you can access from a Firefox extension. Follow an example of how to use this API from within your extension code. Take a skeleton Hello World extension and give it the ability to store an hCard from a Web page and then use that stored hCard to populate a Web form.

Learning good habits in XML can make all the difference between taking advantage of the functionality offered by XML and struggling against the XML standard to get the basics of validation and parsing right. Discover 10 good habits that improve your effectiveness and efficiency as you work with XML documents and data.

XML can be used to create text documents that contain data in a structured format. In addition to the data, you can include a detailed set of rules that define the structure of the data. The author of the XML document defines these rules.