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67 lines
4.7 KiB
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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 19.3.1</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="19_c.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="19_c.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="19_caa.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
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<HR>
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<H2>
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19.3.1 Syntax of Logical Pathname Namestrings</H2> <P>
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The syntax of a <A REL=DEFINITION HREF="26_glo_l.htm#logical_pathname"><I>logical pathname</I></A> <A REL=DEFINITION HREF="26_glo_n.htm#namestring"><I>namestring</I></A> is as follows. (Note that unlike many notational descriptions in this document, this is a syntactic description of character sequences, not a structural description of <A REL=DEFINITION HREF="26_glo_o.htm#object"><I>objects</I></A>.) <P>
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<PRE>
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logical-pathname::= [host host-marker]
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[relative-directory-marker] {directory directory-marker}*
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[name] [type-marker type [version-marker version]]
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</PRE>
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<P>
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<PRE>
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host::= word
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</PRE>
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<PRE>
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directory::= word | wildcard-word | wild-inferiors-word
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</PRE>
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<PRE>
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name::= word | wildcard-word
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</PRE>
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<PRE>
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type::= word | wildcard-word
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</PRE>
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<PRE>
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version::= pos-int | newest-word | wildcard-version
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</PRE>
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<P>
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<I>host-marker</I>---a <A REL=DEFINITION HREF="26_glo_c.htm#colon"><I>colon</I></A>. <P>
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<I>relative-directory-marker</I>---a <A REL=DEFINITION HREF="26_glo_s.htm#semicolon"><I>semicolon</I></A>. <P>
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<I>directory-marker</I>---a <A REL=DEFINITION HREF="26_glo_s.htm#semicolon"><I>semicolon</I></A>. <P>
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<I>type-marker</I>---a <A REL=DEFINITION HREF="26_glo_d.htm#dot"><I>dot</I></A>. <P>
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<I>version-marker</I>---a <A REL=DEFINITION HREF="26_glo_d.htm#dot"><I>dot</I></A>. <P>
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<I>wild-inferiors-word</I>---The two character sequence ``<TT>**</TT>'' (two <A REL=DEFINITION HREF="26_glo_a.htm#asterisk"><I>asterisks</I></A>). <P>
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<I>newest-word</I>---The six character sequence ``<TT>newest</TT>'' or the six character sequence ``<TT>NEWEST</TT>''. <P>
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<I>wildcard-version</I>---an <A REL=DEFINITION HREF="26_glo_a.htm#asterisk"><I>asterisk</I></A>. <P>
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<I>wildcard-word</I>---one or more <A REL=DEFINITION HREF="26_glo_a.htm#asterisk"><I>asterisks</I></A>, uppercase letters, digits, and hyphens, including at least one <A REL=DEFINITION HREF="26_glo_a.htm#asterisk"><I>asterisk</I></A>, with no two <A REL=DEFINITION HREF="26_glo_a.htm#asterisk"><I>asterisks</I></A> adjacent. <P>
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<I>word</I>---one or more uppercase letters, digits, and hyphens. <P>
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<I>pos-int</I>---a positive <A REL=DEFINITION HREF="26_glo_i.htm#integer"><I>integer</I></A>. <P>
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<A REL=CHILD HREF="19_caa.htm"><H2>
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19.3.1.1 Additional Information about Parsing Logical Pathname Namestrings</H2></A><P> <P>
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<P><HR>The following <A REL=META HREF="../Front/X3J13Iss.htm">X3J13 cleanup issue</A>, <I>not part of the specification</I>, applies to this section:<P><UL><LI> <A REL=CHILD HREF="../Issues/iss259.htm">PATHNAME-LOGICAL:ADD</A><P></UL><HR>
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