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1. HTML Web Standards

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The latest web browsers and web pages have become more complicated and complex, therefore web developers now take deep consideration to Web Standards when creating HTML pages

For example:

  • Web Developers now declare a web page with the following markup as a standard.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

Note:

  • The above markup declares the HTML web page and complies with the XHTML 1.0 Strict standard.

  • XHTML 1.0 converts HTML markup into well-formed XML. This means, the HTML code complies with XML rules that follow.

    • Self-closing tags – All tags used in the HTML code must be self-closing for instance, <img> with <img/> and <br> with <br/>.

    • Close all tags – Tags like <p> and <li> are now completed with </p> and </li>.

    • Quote attributes – The use of quotes for instance, id= “myID” instead of id=myID.

    • Consistent case – All HTML code should be of the same Case, for instance <A> tag should be <a>. This makes XHTML validation easier if all the code is lowercase. This can be set as an option in Visual Studio HTML editor.

    • Use entities – Reserved characters are converted to their special sequences for instance:
    • < will be &lt;

    • > will be &gt;

    • & will be &amp;

    • ‘ will be &apos;

    • “ will be &quot;

The following chapter shows two types of web standards available for you when you create HTML pages:

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Table of Contents

» Chapter 1 - HTML Web Standards
        Chapter 1.1 - Visual Studio and Standards
        Chapter 1.2 - External XHTML validation
Chapter 2 - Creating Columns Using CSS
        Chapter 2.1 - Page Layout using <div> tags
        Chapter 2.2 - ASP.NET Document Outline
        Chapter 2.3 - Style Rules for <div> tags
Chapter 3 - Improving Web Page Performance
        Chapter 3.1 - Turning off ViewState
        Chapter 3.2 - Caching Content
                Chapter 3.2.1 - Page-Level Caching
                Chapter 3.2.2 - Cache Period
Chapter 4 - Accessibility Requirements
        Chapter 4.1 - Image Alternate Text
        Chapter 4.2 - Avoiding Table for Layouts
        Chapter 4.3 - Client-side Scripts
        Chapter 4.4 - Validating Web Accessibility
Chapter 5 - Increasing Web Page Usability
        Chapter 5.1 - Tab Order
        Chapter 5.2 - Access Keys
        Chapter 5.3 - Default Focus and Default Buttons

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