From: "Adam Dickmeiss" <[log in to unmask]>
> I don't think we'll be implementing it.. Regular expressions suit us
> fine at this point. AFAIK.

The reason for the proposal in the first place was to support subfield
queries like:
marc.533$7=/substring="1:4" 1992
to search (in this example) on year of publication.
(All other hypothetical uses of substring are speculative at this point.)

How would you accomplish this query with a regular expression?

--Ray