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32 lines
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<TITLE>CLHS: Section 19.2.2.4.6</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_bbde.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="19_bbd.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="19_bbdg.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
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19.2.2.4.6 Restrictions on Examining a Pathname Version Component</H2> <P>
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The version can be any <A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>symbol</I></A> or any <A REL=DEFINITION HREF="26_glo_i.htm#integer"><I>integer</I></A>. <P>
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The symbol <TT>:newest</TT> refers to the largest version number that already exists in the <A REL=DEFINITION HREF="26_glo_f.htm#file_system"><I>file system</I></A> when reading, overwriting, appending, superseding, or directory listing an existing <A REL=DEFINITION HREF="26_glo_f.htm#file"><I>file</I></A>. The symbol <TT>:newest</TT> refers to the smallest version number greater than any existing version number when creating a new file. <P>
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The symbols <A REL=DEFINITION HREF="a_nil.htm#nil"><B>nil</B></A>, <TT>:unspecific</TT>, and <TT>:wild</TT> have special meanings and restrictions; see <A REL=CHILD HREF="19_bbb.htm">Section 19.2.2.2 (Special Pathname Component Values)</A> and <A REL=CHILD HREF="19_bbe.htm">Section 19.2.2.5 (Restrictions on Constructing Pathnames)</A>. <P>
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Other <A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>symbols</I></A> and <A REL=DEFINITION HREF="26_glo_i.htm#integer"><I>integers</I></A> have <A REL=DEFINITION HREF="26_glo_i.htm#implementation-defined"><I>implementation-defined</I></A> meaning. <P>
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