57 lines
3.3 KiB
HTML
57 lines
3.3 KiB
HTML
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<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="dc.language" scheme="rfc1766" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<meta name="dc.date" scheme="iso8601" content="2005-09-06" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow"/>
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<title>Code pages</title>
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<link rel="stylesheet" type="text/css" href="ibmidwb.css" />
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<link rel="stylesheet" type="text/css" href="ic.css" />
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</head>
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<body>
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<a id="Top_Of_Page" name="Top_Of_Page"></a><!-- Java sync-link -->
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<script language = "Javascript" src = "../rzahg/synch.js" type="text/javascript"></script>
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<a name="rzaluconcodepages"></a>
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<h5 id="rzaluconcodepages">Code pages</h5>
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<p>Code pages come in two types: </p>
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<ul>
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<li>Code page (stand-alone)</li>
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<li>Character set and code page combination (referred to as a CHRID).</li></ul>
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<p>Code pages are groups of characters. Within a code page, there are unique
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hexadecimal identifiers assigned to each of the characters.</p>
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<p>As you enter your text at a computer keyboard, each keyboard character
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is translated into a code point. When the text is printed, each code point
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is matched to a character ID on the code page you specified. The character
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ID is then matched to the image (raster pattern) of the character in the character
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set you specified.</p>
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<p>Some of these characters can be repeated in different code pages and have
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a different hexadecimal identifier assigned to them. Conversely, the hexadecimal
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identifier can be the same, but the characters will be different. Therefore,
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if you have applications that use certain characters contained in only one
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particular code page, it is important to know which code page you are using.</p>
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<p>Below is a diagram of two code pages: code page 37 and code page 285.
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They are printed in a 10-characters-per-inch (courier 10) font. Notice the
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different character that occurs at code point hex <span class="hex">X'5B'</span>. One is a
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US dollar ($) sign and the other an English pound or currency sign. This
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example shows that different characters will print depending on the code page
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you specify even though you are using an identical font style.</p>
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<a name="wq49"></a>
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<div class="fignone" id="wq49">
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<div class="mmobj">
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<img src="rv2h330.gif" alt="This example shows that different characters will print depending on the code page you specify even though you are using an identical font style." /></div></div>
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<a id="Bot_Of_Page" name="Bot_Of_Page"></a>
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</body>
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</html>
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