>Do you actually oppose assigning them, or just making them visible to
> the user? 
in some sense "invisible to the users" identifiers are assigned to all files 
even now in the 
form
  handle/sequence_id/filename 
and I don't think it is possible to build a repository where you will not 
assign them.
However if I understand correctly, you were talking about something else e.g.
about generating URIs for each file which will have to be unique, permanent and
system independent. That implies additional maintenance costs for the 
repository.

> Naturally the "citation link" would be exactly as it is now
> (ie: pointing to an Item). Personally, I can't see any reason why having
> this information available would be harmful, so I'm interested to
> understand why you might think it was a bad idea (I'm very open to input
> here).
> 
For our Preservation repository we use external handle server. Handles for 
items 
are generated using NOID on pre-ingest stage and are registered when item is
ingested (we modified your handle server patch a bit).Most of our items have 
a rather complex structure and might include thousands of files in various 
formats 
which come from different sources. If we would have to support URIs on file 
level 
it would mean additional workflow steps and a more complicated pre-ingest 
process. 
On the other hand,  it will not give us any additional functionality because 
our 
repository services are based on item not on file level.  

I don't think it's necessarily a bad idea, but I think it can have some
serious consequences which might be bad for us. 
The decision on what level to support URIs determines, at least to some
extent, what is the basic element in a repository. It's rather important
decision, which might impact the repository architecture as a whole. I
am concerned that if we (at NYU) do not support individual file's URIs
while most other Dspace repositories do, then we might have problems
with data compatibility and, in the long run, even with Dspace version
upgrades. 

Regards.

Kate


Ekaterina Pechekhonova
Digital Library Programmer/Analyst
New York University
Libraries
email: [EMAIL PROTECTED]
phone: 212-992-9993

----- Original Message -----
From: James Rutherford <[EMAIL PROTECTED]>
Date: Friday, July 20, 2007 4:32 am
Subject: Re: [Dspace-tech] [vote] Do we want to assign external identifiers 
(Handles) to files?
To: Ekaterina Pechekhonova <[EMAIL PROTECTED]>
Cc: DSpace Tech <[email protected]>

> On Thu, Jul 19, 2007 at 01:47:19PM -0400, Ekaterina Pechekhonova wrote:
> > +1 as it usually better to have more options then less. 
> > However, in our repository we keep identifiers on item level as we
> > see item as a repository "atomic" structure, and we think it's pretty
> > important that file identifiers will be an option not a default.
> 
> Do you actually oppose assigning them, or just making them visible to
> the user? Naturally the "citation link" would be exactly as it is now
> (ie: pointing to an Item). Personally, I can't see any reason why having
> this information available would be harmful, so I'm interested to
> understand why you might think it was a bad idea (I'm very open to input
> here).
> 
> cheers,
> 
> Jim
> 
> -- 
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