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XForms Basics, Part 3
By: Harish Kamath, (c) Melonfire
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    2004-01-19

    Table of Contents:
  • XForms Basics, Part 3
  • Operating with Extreme Caution
  • Money, Money, Money
  • Shop 'till You Drop
  • The Bookworm Turns
  • An Event to Remember
  • Link Out

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    XForms Basics, Part 3 - Link Out
    (Page 7 of 7 )

    And that's about all I have for you. Over the course of this three-part tutorial, I introduced you to the new XForms 1.0 specification, and showed you how to create a data model and bind its elements to form input controls. I also explained the various XForms input controls, and showed you how they map into the standard HTML form controls.

    Next, I discussed the process of submitting an XForm, with a look at the <xforms:submission> element and the "submit" input control. I also showed you how to perform primitive datatype validation in an XForm using built-in XML Schema datatypes, and how to extend this to perform more complex validation by integrating your own custom datatypes into the XForms model.

    Finally, in this concluding part, I introducing the concept of binding using the <xforms:bind> element, which allows you to disable or enable input controls, mark them as read-only, enforce special constraints on your input controls, and even calculate values on the fly - tasks which earlier required complex JavaScript, but are now as simple as combining XPath expressions. I also looked at some XPath functions, and showed you how you can use them within your binding expressions for greater flexibility in calculations. I wrapped things up with a brief introduction to the XForms event model - this is a fairly complex topic, and one which requires in-depth understanding of the XML Events specification as well, so if you'd like to learn more about it, be prepared to spend some time on research (with the specification in hand).

    I hope you enjoyed this article, and that it gave you sufficient grounding to get you started with XForms. XForms is one of the more interesting emerging XML technologies, and you can expect to see it grow more powerful in subsequent iterations. So go on - it's time to practice!

    Note: Examples are illustrative only, and are not meant for a production environment. Melonfire provides no warranties or support for the source code described in this article.


    DISCLAIMER: The content provided in this article is not warranted or guaranteed by Developer Shed, Inc. The content provided is intended for entertainment and/or educational purposes in order to introduce to the reader key ideas, concepts, and/or product reviews. As such it is incumbent upon the reader to employ real-world tactics for security and implementation of best practices. We are not liable for any negative consequences that may result from implementing any information covered in our articles or tutorials. If this is a hardware review, it is not recommended to open and/or modify your hardware.

     

       

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