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7.1 xhtml validation
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- 2. What is Validation? Validation is a method of verifying that we have made no syntax or rules violations on our web pages. This step is important, as it helps ensure that our websites display properly and consistently to our visitors. We validate our pages and make any necessary corrections prior to posting them live on the internet. Whenever we make major changes to a page, we should revalidate it.
- 3. More About Validation: The rules applied to the page validation depend on the DOCTYPE specified in the first line of the web page. Our web pages use a DOCTYPE of XHTML 1.0 Transitional, so we are required to comply with that set of rules. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
- 4. How Do WeValidate a Page? Go to http://validator.w3.org/ If our web page file is on our local computer only, we can upload it. If our web page file is online, we can simply enter the URL.
- 5. If Our PagePasses Validation: If no errors are detected, we will get a green bar letting us know that our page validated.
- 6. If Our PageFails Validation: If our page contains errors, we will see a red bar and the number of errors will be listed.
- 7. Viewing the Errors: The validator will list all errors found. It tells us what the problem is and which line it occurs on.
- 8. Making the Corrections: Don't panic when you see that there are errors on your page. It's very common. Make the corrections one or two at a time and revalidate the document. Often, you will find that by making a single correction, the error count will drop dramatically. Continue working through the corrections until your document validates with no errors.