September 2004
Intermediate to advanced
712 pages
24h 45m
English
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Child Elements
Another simple content specification is one that says
the element must have exactly one child of a given type. In this
case, the content specification consists of the name of the child
element inside parentheses. For example, this declaration says that
a fax element must contain
exactly one phone_number
element:
<!ELEMENT fax (phone_number)>
A fax element may not
contain anything else except the phone_number element, and it may not
contain more or less than one of those.
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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.