[Moims-dai] Architecture Description

[Mark Conrad]

"Preservation Description Information (PDI): The information, which along
with Representation Information, is necessary for adequate preservation of
the *Content Data Object*"




On Wed, Jun 12, 2019 at 1:38 PM David Giaretta <david at giaretta.org> wrote:

> In OAIS terms PDI may be part of any Information Package. If the
> Information Package is an AIP then by implication the Information Object it
> will probably be Content Information.
>
>
>
> ..David
>
>
>
> *From:* MOIMS-DAI <moims-dai-bounces at mailman.ccsds.org> *On Behalf Of *Mark
> Conrad
> *Sent:* 12 June 2019 17:51
> *To:* MOIMS-Data Archive Interoperability <moims-dai at mailman.ccsds.org>
> *Cc:* Hughes, John S (398B) <john.s.hughes at jpl.nasa.gov>
> *Subject:* Re: [Moims-dai] Architecture Description
>
>
>
> " I cannot understand why Content_Information (a sub-type of
> Information_Object) shows methods
> get/putPreservationDescriptionInformation.  That would normally indicate
> that these are additional methods in addition to those which
> Information_Object has – but why? "
>
>
>
> Because PDI does not apply to all Information_Objects - only
> Content_Information.
>
>
>
> Mark Conrad
> NARA Information Services
>
> Systems Engineering Division (IT)
> The National Archives and Records Administration
> Erma Ora Byrd Conference and Learning Center
> Building 494, Room 225
> 610 State Route 956
> Rocket Center, WV  26726
>
> Phone: 304-726-7820
> Fax: 304-726-7802
> Email: mark.conrad at nara.gov
>
>
>
>
>
> On Tue, Jun 11, 2019 at 9:17 AM David Giaretta <david at giaretta.org> wrote:
>
> Hi Steve
>
>
>
> I can understand why get/setDataObject and
> get/putRepresentationInformation are methods in Information_Object but I
> don’t understand why get/putInformationObjectMetadata is there. Also don’t
> understand the difference between get/setPID and
> get/putIdentificationInformation. Also what is the difference between put
> and set?
>
>
>
> I cannot understand why Content_Information (a sub-type of
> Information_Object) shows methods
> get/putPreservationDescriptionInformation.  That would normally indicate
> that these are additional methods in addition to those which
> Information_Object has – but why?
>
>
>
> Is there are mix-up between Information_Object and Information_Package?
>
>
>
> I suspect that part of my confusion arises from using the ontology rather
> than a UML tool to create the diagrams etc. but that would not explain my
> questions/comments above.
>
>
>
> Regards
>
>
>
> ..David
>
>
>
> *From:* MOIMS-DAI <moims-dai-bounces at mailman.ccsds.org> *On Behalf Of *Hughes,
> John S (398B) via MOIMS-DAI
> *Sent:* 11 June 2019 03:16
> *To:* MOIMS-Data Archive Interoperability <moims-dai at mailman.ccsds.org>
> *Cc:* Hughes, John S (398B) <john.s.hughes at jpl.nasa.gov>
> *Subject:* [Moims-dai] Architecture Description
>
>
>
> Hi all,
>
>
>
> Attached please find the Model Specification Document (html format) and
> two diagrams with a few updates to some core classes. In particular the DPI
> get/put methods have been moved to the Content_Information class as per
> recent discussions.
>
>
>
> Thanks,
>
> Steve
>
>
>
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