December 1999
Intermediate to advanced
992 pages
22h 3m
English
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XHTML and Document Validity
In order for you to validate XHTML documents, there must be a DTD that carefully describes the structure of XHTML. Instead of developing a single DTD for XHTML document validation, the W3C went a step further and developed three DTDs, which are all included in the XHTML specification. These DTDs are approximations of the equivalent SGML DTDs and provide varying levels of detail for XHTML, which results in three different classifications of XHTML documents. The idea is that you can use a more minimal XHTML DTD if you don't need to use certain XHTML language features; if you do, you can use a more thorough DTD. The three XHTML DTDs are classified as follows, in order of increasing functionality:
Strict—No HTML presentation ...
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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.