This is where the difference between access objects and archival objects is
relevant. Practices involving modification of archival objects in ways like
this strike me as unfortunate. It is a nonissue with access objects.

Having said that, checksums introduce some challenges. For example,
embedded metadata cannot be modified.

Kyle
On Apr 13, 2014 4:23 PM, "Bernadette Houghton" <
[log in to unmask]> wrote:

> We are currently considering the issue of cover sheets for our repository,
> but these don't seem to be compatible with the use of checksums/fixity.
>
> Cover sheets may not necessarily be added at very first ingest into the
> repository, meaning that once they are, the checksum of the object will
> change. Maybe at some stage the cover sheet will be removed, for whatever
> reason; maybe down the track we'll want to change the coversheet. Lots of
> maybes here, all amounting to the fact that if we do use cover sheets,
> we'll no longer be able to rely on checksums to verify the integrity of an
> object.
>
> Has anybody else considered this issue?
>
> Bernadette Houghton
> Library Business Applications Developer
> Library
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