Continuing the Discussion on WML Theory: Part 4 - WML Structure
In our previous blog posts, we delved into the intricacies of WML (Wireless Markup Language) theory. We discussed its history, benefits, and basic structure. In this post, we'll dive deeper into the WML structure.
Sections and Frames
WML uses a unique structure consisting of sections and frames. Sections define the content and logic of a document, while frames handle the user interface.
Sections
Sections are defined using the <section> tag. Each section is associated with a particular URL. When the WML browser loads a document, it starts loading the content of the first section. Once the content is loaded, the browser displays it to the user.
<section url="section1.wml">
<!-- Content of the first section goes here -->
</section>
<section url="section2.wml">
<!-- Content of the second section goes here -->
</section>
Frames
Frames define the user interface of a document. A WML document can have multiple frames, each with its own content and behavior. The most common type of frame is a card. Cards are displayed one at a time and cover the entire screen.
<frame type="wap-capability" name="capabilities">
<!-- Capability information goes here -->
</frame>
<frame type="browser" name="main">
<animate type="transition" name="slide">
<!-- Transition animation goes here -->
</animate>
<card id="card1">
<!-- Content of card1 goes here -->
</card>
<card id="card2">
<!-- Content of card2 goes here -->
</card>
</frame>
In the above example, we have defined two frames - one for capabilities and another for the main content. The main frame has two cards. When the user navigates through the document, the cards are displayed one at a time.
Conclusion
Understanding the structure of WML documents is crucial in building effective and engaging mobile applications. By mastering the use of sections and frames, you can create dynamic and interactive experiences for your users. Stay tuned as we explore more advanced concepts in future blog posts!
If you have any questions or comments, feel free to drop them below!