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<TITLE>CLHS: Section 13.1.4</TITLE>
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<H1><A REV=MADE HREF="http://www.lispworks.com/"><IMG WIDTH=80 HEIGHT=65 ALT="[LISPWORKS]" SRC="../Graphics/LWSmall.gif" ALIGN=Bottom></A><A REL=TOP HREF="../Front/index.htm"><IMG WIDTH=237 HEIGHT=65 ALT="[Common Lisp HyperSpec (TM)]" SRC="../Graphics/CLHS_Sm.gif" ALIGN=Bottom></A> <A REL=PREV HREF="13_ac.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="13_a.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="13_ada.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
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<H2>
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13.1.4 Character Categories</H2> <P>
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There are several (overlapping) categories of <A REL=DEFINITION HREF="26_glo_c.htm#character"><I>characters</I></A> that have no formally associated <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> but that are nevertheless useful to name. They include <A REL=DEFINITION HREF="26_glo_g.htm#graphic"><I>graphic</I></A> <A REL=DEFINITION HREF="26_glo_c.htm#character"><I>characters</I></A>, <A REL=DEFINITION HREF="26_glo_a.htm#alphabetic"><I>alphabetic</I></A>[1] <A REL=DEFINITION HREF="26_glo_c.htm#character"><I>characters</I></A>, <A REL=DEFINITION HREF="26_glo_c.htm#character"><I>characters</I></A> with <A REL=DEFINITION HREF="26_glo_c.htm#case"><I>case</I></A> (<A REL=DEFINITION HREF="26_glo_u.htm#uppercase"><I>uppercase</I></A> and <A REL=DEFINITION HREF="26_glo_l.htm#lowercase"><I>lowercase</I></A> <A REL=DEFINITION HREF="26_glo_c.htm#character"><I>characters</I></A>), <A REL=DEFINITION HREF="26_glo_n.htm#numeric"><I>numeric</I></A> <A REL=DEFINITION HREF="26_glo_c.htm#character"><I>characters</I></A>, <A REL=DEFINITION HREF="26_glo_a.htm#alphanumeric"><I>alphanumeric</I></A> <A REL=DEFINITION HREF="26_glo_c.htm#character"><I>characters</I></A>, and <A REL=DEFINITION HREF="26_glo_d.htm#digit"><I>digits</I></A> (in a given <A REL=DEFINITION HREF="26_glo_r.htm#radix"><I>radix</I></A>). <P>
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For each <A REL=DEFINITION HREF="26_glo_i.htm#implementation-defined"><I>implementation-defined</I></A> <A REL=DEFINITION HREF="26_glo_a.htm#attribute"><I>attribute</I></A> of a <A REL=DEFINITION HREF="26_glo_c.htm#character"><I>character</I></A>, the documentation for that <A REL=DEFINITION HREF="26_glo_i.htm#implementation"><I>implementation</I></A> must specify whether <A REL=DEFINITION HREF="26_glo_c.htm#character"><I>characters</I></A> that differ only in that <A REL=DEFINITION HREF="26_glo_a.htm#attribute"><I>attribute</I></A> are permitted to differ in whether are not they are members of one of the aforementioned categories. <P>
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Note that these terms are defined independently of any special syntax which might have been enabled in the <A REL=DEFINITION HREF="26_glo_c.htm#current_readtable"><I>current readtable</I></A>. <P>
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<A REL=CHILD HREF="13_ada.htm"><H2>
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13.1.4.1 Graphic Characters</H2></A><P>
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<A REL=CHILD HREF="13_adb.htm"><H2>
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13.1.4.2 Alphabetic Characters</H2></A><P>
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<A REL=CHILD HREF="13_adc.htm"><H2>
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13.1.4.3 Characters With Case</H2></A><P>
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<A REL=CHILD HREF="13_add.htm"><H2>
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13.1.4.4 Numeric Characters</H2></A><P>
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<A REL=CHILD HREF="13_ade.htm"><H2>
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13.1.4.5 Alphanumeric Characters</H2></A><P>
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<A REL=CHILD HREF="13_adf.htm"><H2>
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13.1.4.6 Digits in a Radix</H2></A><P><HR>
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<A REL=NAVIGATOR HREF="../Front/StartPts.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Starting Points]" SRC="../Graphics/StartPts.gif" ALIGN=Bottom></A><A REL=TOC HREF="../Front/Contents.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Contents]" SRC="../Graphics/Contents.gif" ALIGN=Bottom></A><A REL=INDEX HREF="../Front/X_Master.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Index]" SRC="../Graphics/Index.gif" ALIGN=Bottom></A><A REL=INDEX HREF="../Front/X_Symbol.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Symbols]" SRC="../Graphics/Symbols.gif" ALIGN=Bottom></A><A REL=GLOSSARY HREF="../Body/26_a.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Glossary]" SRC="../Graphics/Glossary.gif" ALIGN=Bottom></A><A HREF="../Front/X3J13Iss.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Issues]" SRC="../Graphics/Issues.gif" ALIGN=Bottom></A><BR>
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<A REL=COPYRIGHT HREF="../Front/Help.htm#Legal"><I>Copyright 1996-2005, LispWorks Ltd. All rights reserved.</I></A><P>
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