January 2003
Beginner to intermediate
1200 pages
23h 42m
English
Content preview from Real World XML
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Extending Public XHTML DTDs
In the previous section, I created a new DTD to extend XHTML, and I put it to work in an XHTML document like this:
<?xml version="1.0"?>
<?xml-stylesheet type="text/css" href="ch17_19.css"?>
<!DOCTYPE html SYSTEM "ch17_17.dtd">
<html xmlns="ch17_17.dtd"
xml:lang="en" lang="en">
<head>
<title>
</title>
</head>
<body>
<p>
This text uses a new XHTML element for
<underlinedredtext>emphasis</underlinedredtext>.
</p>
</body>
</html>
In this case, I declared a local DTD for private use with the SYSTEM keyword. You can also make your DTD public with the PUBLIC keyword, but to do that, you've got to create a formal public identifier (FPI). Here are the rules for FPIs:
The first field in an FPI specifies the connection of ...