How to modify a page

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How to modify a page

This site contains general information about HTML, but mostly it contains help for the following:

Currently a lot of OpenSP and Accessibility pages have missing samples or unclear descriptions. You are welcome to contribute and improve these pages, or you may add a new page for topics that interest you about HTML. To do this, click on the EDIT tab on the top of each page.

Wiki Page Structure

When editing a page, please follow these guidelines. For the following errors, the structure of the page is the same:

  1. Title: There should be an error title on the top of the page
  2. Cause: A cause that explains the reason for the error
  3. Example: Some error samples. Often a bad sample and a good one that show how to correct the error will suffice
  4. Solution: A short description of the fix for this error
  5. References: URL References to W3C specifications or other interesting links about the topic.

Here is an example structure using the Wiki markup:

== Title ==
=== Cause: ===
Describe the cause of the problem here.

=== Example: ===
<bad>A sample showing incorrect syntax</bad>
<good>A sample showing corrected syntax</good>

=== Solution: ===
Describe the solution (or solutions) here.

=== References: ===
* Describe the link:

Wiki Markup

The pages use a standard Wiki syntax. For a quick help, look at:

In addition to the above syntax links, and 2 tags: <good>, <bad> for showing the good and bad samples.

You can of course ask questions in the DISCUSSION Tab of the error if the page is not clear.


To test on a empty MediaWiki, please use:


Finally, here is the example of an error OpenSP error. The error is reproduced below, for easy reference:

OpenSP: unterminated comment: found end of entity inside comment


Check that you are using a proper syntax for your comments, e.g: <!-- comment here -->. This error may appear if you forget the last "--" to close one comment, therefore including the rest of the content in your comment.


Bad<!-- comment here >
Good<!-- comment here -->


Fix the broken comment.