On Fri, Jun 15, 2012 at 12:39 PM, Wellaway, Ian
<[email protected]> wrote:
> Does anyone know that if you submit to DSpace by reference, and subsequently
> change the file (overwrite it with another for instance) after the item has
> been entered into the archive, does this produce an error?
>
> We tried it and it seems OK but we’re worried that DSpace may notice that
> the checksum doesn’t match the file contents at some later point or after
> some sort of integrity check.

Hi Ian,

I believe by "submit to DSpace by reference" you mean registering
bitstreams 
(<https://wiki.duraspace.org/display/DSDOC18/Registering+(not+Importing)+Bitstreams+via+Simple+Archive+Format>).
I haven't used it in production, but I played around with it.

Someone correct me if I'm wrong, but I don't think that checksums are
used for anything else other than the checksum checker
(<https://wiki.duraspace.org/display/DSDOC18/Validating+CheckSums+of+Bitstreams>).
This is also how you can get a list of these changed files.

In any case, if your file chages, you should deregister it (--delete)
and register it again. You may also look at --replace, it might do the
same.

Regards,
~~helix84

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