[DDI-SRG] Two further URN/ID issues

[Wendy Thomas]

yes

On Mon, 11 May 2009, Joachim Wackerow wrote:

> Wendy,
>
> Please note, that bug 220 (URN syntax issue) is fixed and bug 236 (DDI 
> registered name) is waiting for regular expression according to the changes 
> file of Arofan.
>
> Achim
>
> Wendy Thomas wrote:
>> 
>> This was one of the delayed bugs...Arofan needed the specific regular 
>> expression to enter. We can fix this in the published version.
>> 
>> wendy
>> 
>> On Mon, 11 May 2009, Joachim Wackerow wrote:
>> 
>>> URNType in reusable should be formally described by a regular
>>> expression. This way basic syntax check for URN's is possible by
>>> validating against the XML Schemas. Currently URNType is just xs:anyURI,
>>> which seems to be very lax.
>>> Are there any reasons, why regular expression are not used already?
>>> 
>>> 
>>> BaseIDType is a xs:string restricted by the regular expression
>>> ([A-Z]|[a-z]|\*|@|[0-9]|_|$|\-)*
>>> The field documentation says: Valid characters include A-Z, a-z, @, 0-9,
>>> _, -, $
>>> 
>>> There are two issues with this:
>>> - the dollar sign should be escaped in the regular expression
>>> - the asterisk - mentioned in the regexp is not described in the
>>> documentation
>>> 
>>> Anyway, I'm wondering why are special signs ("*", "$", "@") necessary in
>>> an id. Are they really required?
>>> 
>>> Especially the "@" can make problems in DDI URN resolution services.
>>> Some resolution service will use a REST-based approach for querying
>>> URN's like:
>>> http://xy.org/DDIURNResolutionService?URN
>>> 
>>> URN is the query string of this URL. It stands for the complete DDI URN.
>>> A "@" is not allowed in a query string. It must be escaped according the
>>> rules for URL's. This is surely be possible, but makes things more
>>> complicated.
>>> Does "@" make really sense in an DDI ID?
>>> 
>>> -- 
>>> GESIS - Leibniz Institute for the Social Sciences
>>> Postal address: P.O. Box 122155, 68072 Mannheim, Germany
>>> Visiting address: B2 1, 68159 Mannheim, Germany
>>> Phone: +49 (0)621 1246 262
>>> Fax: +49 (0)621 1246 100
>>> E-mail: joachim.wackerow at gesis.org
>>> www.gesis.org/en/institute/
>>> _______________________________________________
>>> DDI-SRG mailing list
>>> DDI-SRG at icpsr.umich.edu
>>> http://www.icpsr.umich.edu/mailman/listinfo/ddi-srg
>>> 
>> 
>> Wendy L. Thomas                          Phone: +1 612.624.4389
>> Data Access Core Director         Fax:   +1 612.626.8375
>> Minnesota Population Center              Email: wlt at pop.umn.edu
>> University of Minnesota
>> 50 Willey Hall
>> 225 19th Avenue South
>> Minneapolis, MN 55455
>
>
> -- 
> GESIS - Leibniz Institute for the Social Sciences
> Postal address: P.O. Box 122155, 68072 Mannheim, Germany
> Visiting address: B2 1, 68159 Mannheim, Germany
> Phone: +49 (0)621 1246 262
> Fax: +49 (0)621 1246 100
> E-mail: joachim.wackerow at gesis.org
> www.gesis.org/en/institute/
>

Wendy L. Thomas                          Phone: +1 612.624.4389
Data Access Core Director		 Fax:   +1 612.626.8375
Minnesota Population Center              Email: wlt at pop.umn.edu
University of Minnesota
50 Willey Hall
225 19th Avenue South
Minneapolis, MN 55455