APARSEN - WP2200
Identifiers and Citability
Interoperability Framework for PI systems
Webinar on PI - 15 February 2013
Maurizio Lunghi
1
WP 22, IDENTIFIERS AND CITABILITY:
OBJECTIVES AND TASK RELATIONS
2
Digital Preservation policy - I
1. Explicit declaration of interest by a user comunity to
use some content in long term
Select what we want to preserve and why and for what use
and under what conditions and for how long, assign
responsibilities & roles, allocate resources.
2. Develop basic services needed for the preservation of
the main info and its significant properties
Basic services needed for any type of user community are
some trusted digital repositories collectively available to the
users and a unique, standard, global and stable identification
system for resources & actors.
Digital Preservation policy - II
1. Periodic regeneration and duplication of content
Digital content must be refreshed and duplicate in different sites,
technology migration must be foreseen. Tools for rendering are
needed.
2. Preserve its significant properties
Descriptive metadata and context info are needed, tools to check
identification, authenticity, provenience and integrity.
3. Preserve other related info
Information is never ‘atomic’, objects have some relations with
other objects and resource and with some actorsc who generated
or modified the content.
Persistent Identifiers
what’s that ??
Persistent Identifier is not only a number, it’s a service
based on a contract between user community or content
holders and service-providers responsible for the
implementation and maintenance of the PI-service and the
functionality of the system.
In addition to access for a resource we need to check other
significant properties:
stable identification (PI) … multiple too
authenticity + integrity
provenance + author
owner + rights
+
relations with other resources & with actors
5
Persistent Identifiers systems
The PI technologies help make stable the reference to digital
resources, even if it is well-known that persistency is not only
a technical issue, no technology can exist indefinitely or
guarantee services without a trusted organization behind
and a clearly defined policy.
PI systems are meant as:
a) available technology
b) trusted organization
c) precise policies for digital preservation,
6
implemented by the managers of the related user community
A Trusted NBN-IT
IETF URN based identifiers, NBN namespace IETF RFC
3188 responsibility cleared assigned to National Libraries
NBN:IT:BNCF-12345
NBN:IT is a service of the legal deposit and supports 3 types
of persistence:
1) Persistence of the identifier
2) Persistence of the association URNs and URLs
3) Persistence of the resource referenced by NBN (backup)
The community is represented by all institutions that want
to deposit contents to the National Library after the signing
of an official agreement (contract)
7
INTEROPERABILITY
FRAMEWORK (IF)
GOAL: to set the foundations and identify the basic concepts
within the universe of PI systems, for developing
appropriate interoperability solutions and services.
MAIN ASSUMPTIONS:
1 In the IF we consider only entities identified by at
least one PI
2 Only PI Domains (PIDs) that meet some criteria are
eligible to be considered in the IF: trusted PI systems
3 We delegate the responsibility to define relations
among resources and actors to the trusted PIDs
8
4 We don’t address digital preservation issues directly
TRUSTED PI SYSTEM: CRITERIA
1. Having at least one Registration Agency.
2. Having one Resolver accessible on the Internet.
3. Uniqueness of the assigned PIs within the PI domain.
4. Guaranteeing the persistence of the assigned PIs.
5. User communities of the PID should implement policies for
digital preservation (e.g. trusted digital repositories)
6. Reliable resolution.
7. Uncoupling the PIs from the resolver.
8. Managing the relations between the PIs within the domain.
9
Activity 2012
1. Validation of the IF model through the HLEG a user
group with 30 experts on PI.
[May-October 2012]
2. Definition and set up of a demonstrator with data
from different PI domains and for objects, people and
bodies
[November-December 2012]
3. Refinement of the IF model and ontology, new
proposal presented at the workshop in Florence on
13 Dec
10
INTEROPERABILITY
FRAMEWORK (IF)
Contents from all PI domains now
are accessible in the same way
CERN
INTEROPERABILITY
FRAMEWORK
New services
cross-domains
for users
requirements
FRD
DNB
DANS
STM
GLOBIT
CERN
11
Action Plan 2013
1. Validation of the new IF model and ontology through
the HLEG with new experts
[February-May 2013]
2. Expansion of the demonstrator on a distributed
environment with content providers on LOD
[March-May 2013]
3. Proposal of few services and development on a cross
PI Domains (PIDs) basis
[June-September 2013]
4. Check user satisfaction on services
[October-December 2013]
12
INTEROPERABILITY
FRAMEWORK (IF)
Contents from all PI domains expose
on LOD in the same way
 Ring of Trust
CERN
DNB
New services
cross-domains
for users
requirements
IF on LOD
FRD
DANS
13