Jakob Voss wrote:

> Rob Sanderson wrote:
>
>>> CQL is a standard of it's own, isn't it? You better keep this part 
>>> in an independent document and refer to it. By the way is there a 
>>> full mapping between CCL and CQL or what exactely is their 
>>> relationship?
>>
> [...]
>
>> There isn't a mapping between CCL and CQL, but if you'd like to write
>> one up, then I'm sure that it would be appreciated by many :)
>
>
> I still wonder how people can call something a standard that is not 
> publically available.

Many, many people have asked themselves the same question..

> CCL is very poorly documented - you can use it in many OPACs in some 
> way but libraries seem to hide it from the user. If you send me a PDF 
> of ISO 8777 I can try to summarize the differences and  commonalities 
> with CQL.

Unfortuantely, ISO8777 doesn't even describe the language that lucidly 
-- the stnadard predates context-free grammars (at least I hope it does 
-- otherwise, I don't know what their excuse would be). Adam put quite a 
bit of effort into capturing the essence of the language in a BNF 
notation.. that might actually be the easiest place to start. You'll 
find it at http://www.indexdata.dk/yaz/doc/tools.tkl#CCL

All the best,

--Sebastian

>
> Greetings,
> Jakob
>

-- 
Sebastian Hammer, Index Data (US)
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Ph: (603) 209-6853