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38 lines
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<!-- Common Lisp HyperSpec (TM), version 7.0 generated by Kent M. Pitman on Mon, 11-Apr-2005 2:31am EDT -->
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<TITLE>CLHS: Section 11.1.2.3</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="11_abb.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="11_ab.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="11_abca.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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11.1.2.3 The KEYWORD Package</H2> <P>
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The <TT>KEYWORD</TT> package contains <A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>symbols</I></A>, called <A REL=DEFINITION HREF="26_glo_k.htm#keyword"><I>keywords</I></A>[1], that are typically used as special markers in <A REL=DEFINITION HREF="26_glo_p.htm#program"><I>programs</I></A> and their associated data <A REL=DEFINITION HREF="26_glo_e.htm#expression"><I>expressions</I></A>[1]. <P>
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<A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>Symbol</I></A> <A REL=DEFINITION HREF="26_glo_t.htm#token"><I>tokens</I></A> that start with a <A REL=DEFINITION HREF="26_glo_p.htm#package_marker"><I>package marker</I></A> are parsed by the <A REL=DEFINITION HREF="26_glo_l.htm#lisp_reader"><I>Lisp reader</I></A> as <A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>symbols</I></A> in the <TT>KEYWORD</TT> package; see <A REL=CHILD HREF="02_cd.htm">Section 2.3.4 (Symbols as Tokens)</A>. This makes it notationally convenient to use <A REL=DEFINITION HREF="26_glo_k.htm#keyword"><I>keywords</I></A> when communicating between programs in different <A REL=DEFINITION HREF="26_glo_p.htm#package"><I>packages</I></A>. For example, the mechanism for passing <A REL=DEFINITION HREF="26_glo_k.htm#keyword_parameter"><I>keyword parameters</I></A> in a <A REL=DEFINITION HREF="26_glo_c.htm#call"><I>call</I></A> uses <A REL=DEFINITION HREF="26_glo_k.htm#keyword"><I>keywords</I></A>[1] to name the corresponding <A REL=DEFINITION HREF="26_glo_a.htm#argument"><I>arguments</I></A>; see <A REL=CHILD HREF="03_da.htm">Section 3.4.1 (Ordinary Lambda Lists)</A>. <P>
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<A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>Symbols</I></A> in the <TT>KEYWORD</TT> package are, by definition, of <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> <A REL=DEFINITION HREF="t_kwd.htm#keyword"><B>keyword</B></A>. <P>
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<A REL=CHILD HREF="11_abca.htm"><H2>
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11.1.2.3.1 Interning a Symbol in the KEYWORD Package</H2></A><P>
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<A REL=CHILD HREF="11_abcb.htm"><H2>
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11.1.2.3.2 Notes about The KEYWORD Package</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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