July 2004
Intermediate to advanced
479 pages
12h 30m
English
Content preview from XML HacksBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.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.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.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.
Choose Tools for Creating an XML Vocabulary
XML provides the syntax necessary to create your own vocabulary or dialect of XML. Here are a few things you need to know about namespaces and schemas.
One of the best things about XML is that you can create your own tags—a vocabulary or dialect—if you want. To create a vocabulary, you should understand a couple of things about schemas and namespaces. You can use XML without schemas or namespaces, but sometimes you want to use one, the other, or both. This hack explains when you’ll want to use schemas and namespaces and when you’ll want to avoid them.
Well-Formedness, Validation, and Schemas
XML documents must be well-formed. This means that they must adhere to the syntax defined in the XML specification (http://www.w3.org/TR/REC-xml/). This syntax mandates such things as matching case in tag names, matching quotes around attribute values, restrictions on what Unicode characters may be used, and so on.
An XML document may also be valid. This means that such a document must conform to the restrictions laid out in an associated schema. Basically, a schema declares or defines what elements and attributes are allowed in a valid instance, including in what order the elements may appear. Governing document layout with schemas can greatly increase the reliability, consistency, and accuracy of exchanged documents.
DTD
The native schema language of XML is the document type definition or DTD [Hack #68] , which is part of the XML specification ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.