g ":-", the rest of the the tag contents
will be used as a default string.  The default string is output if the element
is not found in the pattern.  For example, the format
"%{:weight=:-123}" may expand to ":weight=80" or to the string
":weight=123" if <TT
CLASS="PARAMETER"
><I
>pattern</I
></TT
> does not have weight set.&#13;</P
><P
>&#13;A <I
CLASS="FIRSTTERM"
>count</I
> tag
is one that starts with the character "#" followed by an element
name, and expands to the number of values for the element in the