September 2001
Intermediate to advanced
640 pages
31h 42m
English
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Chapter 31. XHTML
While the HTML 4.01 specification goes a long way in tidying up HTML, it still suffers from sloppy artifacts of HTML’s fast and loose development. Over the years, little was done to make HTML perfectly SGML-compliant. As a result, we have a language with quirky features and browsers that easily forgive basic HTML coding errors.
With the creation of XML (see Chapter 30), the W3C finally had a standard set of rules for defining markup languages. It should come as no surprise that one of the first things they did with their shiny new set of rules is apply them HTML. The resulting XML-ized HTML standard is known as XHTML.
XHTML 1.0 is virtually the same as the HTML 4.01 standard, but more strict. The W3C is aiming eventually to replace HTML with XHTML to keep it in line with the larger family of XML-based markup languages.
This chapter reviews the differences and similarities between HTML 4.0 and XHTML.
XHTML Standards Development
Things are exciting over at the W3C. Now that they have XML on their toolbelts, they seem to be on a roll in rethinking and reshaping document markup. Between January 2000 and June 2001, they have turned out three XHTML Recommendations: XHTML 1.0, XHTML Basic, and XHTML 1.1 (XHTML 1.1 is still “Proposed” as of this writing, but since it’s on the verge of approval, I’ll count it anyway). This section looks at each one.
XHTML 1.0
The XHTML 1.0 Recommendation (released in January 2000) is really just a reformulation of the HTML 4.01 specification ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.