[DDI-SRG] TIC Meeting: Identifier issues

[Chris Nelson]

Joachim,
I agree with option 4. This is, essentially, the way it is done in SDMX.
Both the Id method and the URN method should be supported (as they are in
the option). For referencing in SDMX we allow either or both of the full
identifier by attributes (agency, id, version etc.) and URN. In other words,
if the URN is present then there is no need for the full identifier by
attributes. Is this the intent here? 

For specification of unique Ids, where the URN is composed from a
pre-determined set of components that include the Id, I would prefer to see
the specification of the full identifier by attributes to be mandatory. The
URN could be optional  i.e. for specification the application is not allowed
to specify a URN on its own, as it is not allowed to specify "any" URN - the
URN must be composed to the rules of the DDI URN scheme which includes the
unique Id. 

For both referencing and specification, if both are supplied and there is a
mismatch between the URN and the full id by attributes, then one of them
should take priority.

Just a note, also about the Id as your example is not clear here. For a
maintainable the id is the id of the maintainable. For a versionable or
identifiable, it must also have the id of the maintainable within which it
is contained e.g. when referencing a variable it is mandatory to identify
also the variable scheme.

Regards,
Chris

-----Original Message-----
From: ddi-srg-bounces at icpsr.umich.edu
[mailto:ddi-srg-bounces at icpsr.umich.edu] On Behalf Of Joachim Wackerow
Sent: 29 October 2007 11:22
To: Pascal Heus; DDI Technical Implementation Committee; Chris Nelson
Subject: [DDI-SRG] TIC Meeting: Identifier issues

Pascal, Chris, and others,


We started today the meeting in Dagstuhl. We discussed again the identifier
issue. Please see the attached file for details. Currently we are all opting
for version number 4 (attributes) right now. We would like to think on that.
Do you have any opinions on that?

Additional note:
things like Name, VersionResponsibility and VersionRationale need to be
elements in base abstract Identifier ComplexType.

Pascal:
We will discuss data types. Do you have any additional opinion on the issue
beyond the recorded issues in Mantis?

Achim