July 2006

1
LTAP status

• Peter.sylvester_at_edelweb.fr

2
LTAP reminder

• Very thin layer
• Usable for many use cases
• Record keeping
• long term archive

3
Services

• Basic service (treated)
• Interaction between client and ONE server
• Few and simple operations
• Simple use/profile of protocol
• Example One target, one message, etc
• Extended service (not treated in this doc)
• For front ends and brokers (Encryption,
  splitting, proxies, )
• Can use the same protocol or overload
• May add operations
• Example CompleteTRANSFER from one archive to
  another

4
Transactions

• Transaction based (asynchronous operation)
  borrowed from ebXML
• Request
• Acknowledge (technical)
• Response (business)
• Support for services
• archive/status/verify/export/delete defined by
  service
• Underlying authorization and transport services
• SAML, SOAP, SSL, etc.
• Transaction model almost stable
• Artifacts are probably not necessary,
  identification via hash and long term URI seems
  sufficient.
• French National Archive has defined OAIS like
  operations and services that map down the LTAP
  (without saying so)

5
Transactions

• Asynchronous by need
• Need to wait until evidence available
• Implemented using polling via status function
• Request, acknowledge, final result
• Some clients may only need 1 function status
• Ex. Just archive

6
Basic functions

• Archive insert data in the archive
• Status determine status of archived data
• Export export archive data and evidence data
• Delete delete archive data and evidence data
• Verify demonstrate data integrity and
  authenticity
• Question Can Verify mapped to something in
  WEBDAV?

7
Status

• Document version 01 out, still incomplete, next
  version is already advanced.
• Small tool to allow automatic creation of asn1
  and xsd modules was developped in the meantime.
• Data structures not yet fully included from
  existing implementation

8
To be done

• Result of Verify function?
• Just a date?
• An ERS?
• How to add/handle metainformation?
• Just archive them using existing long term
  reference.

9
General Information

• Authors
• Aleksej Jerman Blazic, SETCCE
• Peter Sylvester, EDELWEB
• Carl Wallace, ORIONSEC