A WWID term is a sequence of hex digits delimited by a period, a
    dash or the beginning or end of the string

    "%" can be  used any number of times, up to the legal length of a
    term, to wildcard a single hex digit

    "*" can  be used once within a term to wildcard 0 to N hex digits,
    but sequences of "*" will be collapsed to a single use and count as 1

    Legal wildcard uses:

       50*1000180b1
       *.*FE1.%%01.80A%
       PGC0.5%%0-1*1-0011-B15*

    Illegal wildcard uses:

       50*001*080b1         - too many multi-char wildcards
       5000.%%%%%.0001.80A0 - too many single-char wildcards