be able to update their databases
     dynamically from one version to the next, you should provide
     <I
CLASS="FIRSTTERM"
>update scripts</I
> that make the necessary changes to go from
     one version to the next.  Update scripts have names following the pattern
     <TT
CLASS="LITERAL"
><TT
CLASS="REPLACEABLE"
><I
>extension</I
></TT
>--<TT
CLASS="REPLACEABLE"
><I
>oldversion</I
></TT
>--<TT
CLASS="REPLACEABLE"
><I
>newversion</I
></TT
>.sql</TT
>
     (for example, <TT
CLASS="LITERAL"
>foo--1.0--1.1