November 2000
Intermediate to advanced
384 pages
8h 8m
English
Content preview from XHTML by Example
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XHTML Document Well-Formedness and Validity
The primary requirement of XHTML documents, as with any XML-based document, is that they be well-formed. Well-formedness means that all elements are written using proper syntax, they are closed where they should be, attribute values are always in quotes, and so on. Validity, which is a requirement of XHTML documents but an optional state for XML documents, requires that the syntax used in XHTML documents also conform to the document type definitions (DTDs) for those documents. You can't have elements nested within each other if the DTD prohibits it, attribute values must conform to the specified range of values, and the document must conform to any other restrictions set out in the DTD.
XHTML has three ...
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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.