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Content Working Group . Paolo Manghi ISTI-CNR paolo.manghi@isti.cnr.it. WG Members. WG Leader. C.H.J.P. Kees Hendriks Dutch National Museum of Natural History. Donatella Castelli ISTI-CNR. Luc Moreau University of Southampton. Detlev Balzer Expert in data models EFG Project.

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content working group

Content Working Group

Paolo Manghi

ISTI-CNR

paolo.manghi@isti.cnr.it

wg members
WG Members

WG Leader

C.H.J.P. KeesHendriks

Dutch National Museum

of Natural History

Donatella Castelli

ISTI-CNR

Luc Moreau

University of

Southampton

DetlevBalzer

Expert in data models

EFG Project

Stefan Gradman

UniversityofBerlin

Paolo Manghi

ISTI-CNR

Leonardo Candela

ISTI-CNR

Rapporteur

expectations
Expectations
  • Identifying interoperability issues from the perspective of Digital Library content
  • Discussing possible approaches to mitigate/resolve the issues identified
  • Cookbook: proposing effective patterns towards their resolution
  • Feedback to the Digital Library Reference Model
strategy
Strategy
  • Identification of a “content interoperability” framework
    • Provider of a resource and consumer in the need of performing a task
  • The Cookbook: identifying the solutions
    • Identification of common patterns for Digital Library resources
    • Identification of common patterns of content interoperability scenarios
    • Description of existing solutions (and real-case experiences)
an c ontent i nteroperability f ramework
An Content Interoperability Framework…

Knowledgemodelingand

design: organization,

end users, designers,

developers

Knowledge

Interoperability

Task

Resource

Relevantfactsabout

the resource: structure, semantics,functionalities

Conceptual

Conceptual

Realization

Realization

Data management systems:

data model and language

Knowledgerepresentation

and provision:

hardware, software,

protocols

Interface

Interface

Toolsfor remote interaction:

data model and language

System

Interoperability

Consumer

Provider

dl resource patterns
DL Resource patterns

Provenance

Format

Information

Object

Context

Attributes

Identifier

dl resource patterns1
DL Resource patterns
  • Information Object Format
    • “Data type”: formal and intensional characterization of the Information Objects
    • Consumer can safely and/or efficiently execute operations over an Information Object based on the structural “assumptions” of the Information Object Format
  • Information Object Attributes
    • Metadata enriching the information object
    • Granularity and quality of metadata strongly characterize the pool of services that can be built by exploiting them
    • The wider is the understanding of metadata the consumer has, the richer is the functionality it will be able to realize by exploiting it
dl resource patterns2
DL Resource patterns
  • Information Object Context
    • Metadata characterizing the circumstances that form the setting for the Information Object
    • Examples: relations with other entities like persons, places, moments in time or abstract ideas that complement the object semantics
  • Information Object Provenance
    • Metadata describing the process that led an Information Object to be in its current state
    • Example: information context and time -specific, both in the aspects captured, their representation, and in term of the objects and processes referred
  • Information Object Identifier
    • The Identifier is a token bound to the Information Object distinguishing it from the others within a certain scope
content interoperability solutions
Content Interoperability Solutions
  • Solutions categorization
    • By “real-case scenario patterns” - to be discussed
      • e.g., given consumer, given provider, providers federation, (non-)cooperative interlocutor
    • By “resource patterns” - others?
    • By “adoption of standards” - which ones?
  • Solutions characterization
    • Changes required to achieve knowledge or/and systemcontent interoperability
      • e.g., transformators, mediators
    • Estimate of design and development cost
towards the cookbook standards example
Towards the Cookbook: Standards example…

Reference data models: data model

Access protocols: data model and language at the conceptual or interface level

Access

Protocols

Reference

Data models

Conceptual

CERIF, MARC,

DublinCore

Realization

CERIF XML,

MARC XML,

Interface

OAI-PMH,

OAI-ORE

towards the cookbook efg federation example
Towards the Cookbook: EFG federation example
  • Federationofproviderswithfilm-oriented information
  • Non-bibliographicresources
  • One consumer withspecific XML schema requirements and OAI-PMH protocol

Knowledge

Interoperability

Task

Conceptual

Conceptual

Resource

EFG Schema:

films and persons

Local Schema:

films and persons

Realization

Realization

D-NET Stores and

Indices

Localimplementation

Interface

Interface

OAI-PMH

harvester

OAI-PMH

with EFG XML Schema

System

Interoperability

Consumer

Provider