How W3Schools Was Converted To XHTML
W3Schools was converted from HTML to XHTML in December 1999, by Hege Refsnes and Ståle Refsnes.To convert a Web site from HTML to XHTML, you should be familiar with the XHTML syntax rules described in the previous chapters.
The following steps were executed (in the order listed below):
A <!DOCTYPE> Was Added
The following <!DOCTYPE> was added to the first line of every page:| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
The xmlns Attribute Was Added
The xmlns attribute was added to the html element of every page:| <html xmlns="http://www.w3.org/1999/xhtml"> |
Lowercase Tags And Attribute Names
A general "find-and-replace" function was executed to replace all uppercase tags with lowercase tags. The same was done for attribute names.All Attribute Values Were Quoted
Every page in W3Schools.com was checked to see that attribute values were quoted.Empty Tags Were Properly Closed
Empty tags are not allowed in XHTML. The <hr> and <br> tags should be replaced with <hr /> and <br />.A general "find-and-replace" function was executed to swap the tags.
We decided not to close the <img> tags with </img>, but with /> at the end of the tag. This was done manually.
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