I don't think that we would implement the CQL context set masking rules in
BIB1, even if it's accepted, unless there's a demand for it.  And I just
don't see that demand happening.
As Jannifer says, to achieve the best results we will have to map to
existing bib1 attributes anyway.

That said, I don't see BIB1 as getting any smaller ;)  So if it'd help
someone to have an honest-to-god BIB1 CQL masking attribute value, then
I'm not going to stand in the way.

Rob

On Fri, 19 Dec 2003, Janifer Gatenby wrote:

> I don't think it is necessary, in fact I would argue that it would be a bad
> thing to do.  It is preferable to map CQL to existing BIB-1 attributes, thus
> achieving interoperability with Z39.50 servers without requiring work from
> them.
>
> Janifer
>
> -----Original Message-----
> From: Mike Taylor [mailto:[log in to unmask]]
> Sent: 19 December 2003 12:14
> To: [log in to unmask]
> Subject: CQL-like Masking Attribute in BIB-1
>
>
> Hi People,
>
> The way I remember it, we planned to add a truncation attribute (105?)
> to the BIB-1 set to express CQL-like masking ("?" for any one
> character, "*" for any number, like Unix shell wildcards).  The idea
> is that it would make it possible in the general case to translate CQL
> queries into BIB-1-based Type-1 queries.
>
> Looking at
>         http://lcweb.loc.gov/z3950/agency/defns/bib1.html#truncation
> it seems that this never actually happened.
>
> Do we want to do this?  As I come to implement the translation of CQL
> masking into BIB-1 terms, with semi-special cases for left- right- and
> both-truncation, I realise that I could use @attr 5=104, Z39.58-style
> masking, by a transliteration of the pattern.  So you could argue
> there's no strong implementation case for truncation-type 105.
>
>  _/|_    _______________________________________________________________
> /o ) \/  Mike Taylor  <[log in to unmask]>  http://www.miketaylor.org.uk
> )_v__/\  "We don't watch _Batman_ as a documentary on the LAPD" --
>          Luis Chiappe's comment on the inaccuracies in the _Jurassic
>          Park_ films.
>
> --
> Listen to my wife's new CD of kids' music, _Child's Play_, at
>         http://www.pipedreaming.org.uk/childsplay/
>

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