April 2001
Intermediate to advanced
112 pages
2h 15m
English
Content preview from XML Pocket Reference, Second Edition
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Entity and Character References
Entity references are used as substitutions for specific characters (or any string substitution) in XML. A common use for entity references is to denote document symbols that might otherwise be mistaken for markup by an XML processor. XML predefines five entity references for you, which are substitutions for basic markup symbols. However, you can define as many entity references as you like in your own DTD. (See the next section.)
Entity references always begin with an ampersand
(&) and end with a semicolon
(;). They cannot appear inside a CDMS
but can be used anywhere else. Predefined entities in XML
are shown in the following table:
| Entity | Char | Notes |
|---|---|---|
&
| & | Do not use inside processing instructions. |
<
| < | Use inside attribute values quoted with ". |
>
| > |
Use after ]] in normal text and inside processing instructions.
|
"
| " | Use inside attribute values quoted with ". |
'
| ' | Use inside attribute values quoted with '. |
In addition, you can provide character references for Unicode
characters with a numeric character reference. A decimal character
reference consists of the string &#, followed by
the decimal number representing the character, and finally, a semicolon
(;). For hexadecimal character references, the string
&#x is followed first by the hexadecimal number
representing the character and then a semicolon. For example, to represent
the copyright character, you could use either of the following lines:
This document is © 2001 by O'Reilly and ...
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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.