a metadata framework for resource discovery of agricultural resources edcl 2001 oai workshop...
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A Metadata Framework for Resource Discovery of Agricultural Resources
EDCL 2001 OAI WorkshopSeptember 4-9, Darmstadt, Germany
Presented by Irene Onyancha
Food and Agricultural Organisation(FAO) of the United NationsLibrary & documentation Systems Division (GIL)
AGRIS/CARIS & Documentation Group
Overview
Objectives Strategy and methodology adopted Results Implementation aspects compared to generic Dublin Core
Metadata Initiative Benefits to FAO, the Agricultural Community and the OAI Future Developments
Main Objective
To define an interoperability layer using emerging standards to facilitate the efficient dissemination of content of agricultural resource
Specific goals:-
To define a low barrier interoperability layer to aid primary resource discovery
to define a richer interoperability layer to aid secondary and tertiary resource discovery
to describe the application in a machine readable format, XML and RDF
to define a common format to homogenising set results on a search interface that enables parallel searching of heterogeneous archives
to assist the management of resources by data owners
Strategy and methodology adopted
Developed a conceptual map of different types of information resources used in agriculture
Evaluated standards and common resource description practices currently used in the domain of agriculture
Drafted a specification for a Dublin Core (DC) based standard for describing document resources
Gave preference to notation and vocabularies terms used in already established standards and and those used in describing agricultural resources
Focused on description of document resources but will proceed to define other types of resources such as projects, other multimedia resources such as photos, maps etc.
Identified a pool of core elements of which we used the DC guidelines to define respective qualifiers
Made a full description of each element and qualifier using the ISO standards for element description
Discussed the proposal on various agricultural forums both in-house and external, including at the Agstandards Mailing list. Agstandards@yahoogroups.com
Strategy and methodology adopted Contd..
Results
Unqualified Dublin Core based metadata Set
Qualified Dublin Core based Metadata set
Sample of an output using the application profile on one of the FAO in-house Databases. The AGRIS Archive
Implementation aspects compared to generic Dublin Core Metadata set
Merged the DC elements Creator, Contributor and Publisher to one main element which we named Creator
Dropped the element Source and elaborated the element Relation to include information of the source
Proposed a new core element, Target Audience Proposed new qualifiers that are not represented in the
generic DC guidelines Proposed the use of Authority files for elements and
qualifiers that have secondary information
Benefits of the application profile to FAO, the Agricultural Community and the OAI
Low-barrier interoperability layer that enables harvesting of metadata through the OAI and sharing and exchange of information in the Agricultural Community
Format for describing and maintaining FAO in-house Information Systems
Format for uniform presentation of meta information on the AGRIS Internet Portal
Format to for the AGRIS (Agricultural Information System). This will promote information exchange and self-reliance of data management by data owners especially in the developing countries
Format for a common interface for retrieval of resources from heterogeneous archives: The AGRIS MHS
Future Developments
Encode and publish the application profile both in XML Document Type Definition (DTD) and RDF
Develop software tools in support of the proposed AG standards (Agricultural Standards)
Develop guidelines for the application profile to assist implementers and users
Project to be presented for further discussion at the International DC-2001 Conference to be held in Tokyo, Japan on October 22-26, 2001
Future Developments Contd..
Workshop with FAO Partners and collaborative Governments to discuss the proposed AG standards
Monitor the impact of the proposed standard in the agricultural community
Register the metadata framework with the DCMI Metadata registry
Initiate a pilot project between FAO and Agricultural Subject gateways to provide a single access point for agricultural resources
For more Information...........
Metadata Framework for Resource Discovery of Agricultural Information: An introduction"
– http://www.fao.org/agris/MagazineArchive/MetaData/Introduction.doc
Presentation of a metadata set for the description of agricultural documents and document-like resources
• it provides the elements and qualifiers of the proposed standard, presented in a hierarchical structure.
– http://www.fao.org/agris/MagazineArchive/MetaData/PresentationSet.doc
Element Description for Agricultural Information Resources
• it provides a more detailed description of all the elements and qualifiers, including information on definitions, rules, and data typing.
– http://www.fao.org/agris/MagazineArchive/MetaData/ElementFinal.doc
Acknowledgement
I wish to acknowledge my colleagues and team members namely;
Fynvola LeHunt Ward, Frehiwot Fisseha, Kafkas Caprazli, Johannes Keizer and Steve Katz
who brought various expertise to the metadata working group.
THANK YOU FOR YOUR ATTENTION
Full element description
More detailed description of each element using a set of 10 attributes recommended by DCMI which conform to the ISO/IEC 11179 standards.
Eight attributes were proposed; Name, Label, Definition, Comments, Language, Datatype and Obligation
Other two, Version and Registration Authority were applied globally
Example: Element Title
Name TitleLabel TitleDefinition A name given to the resource. Typically, a title will be a name by
which the resource is formally knownDatatype AlphanumericMaximum Occurrence Not RepeatableLanguage EnglishObligation OptionalComments
Information Resources at FAO
INPHOGIEWS
EMPRES
CARIS AGRIS Centreat FAO HQ
AG
RIS
In
pu
t C
entr
esFAOCatalogue
FAO Full Text Document Repository
Departmental DatabasesAGRIS Information System
WEB ResourcesHttp://www.fao.org
FAOSTAT
MediaBase
FAO OutreachCentres
Information Resources at FAO....Contd..
Challenges Distributed databases Heterogeneous databases with different data structure and metadata
information Minimum interoperability
Vision Develop a focal point of access for agricultural
information. This has been achieved by the AGRIS Internet Portal
Present meta information in a common format enable ease access of agricultural information
AGRIS Internet Portal
INPHOGIEWS
EMPRES
CARIS AGRIS Centreat FAO HQ
AG
RIS
In
pu
t C
entr
es
FAOCatalogue
FAO Full Text Document Repository
Departmental Databases
AGRIS Information System
WEB ResourcesHttp://www.fao.org
FAOSTAT
MediaBase
AGRIS InternetPortal
AGRIS Multi-hostServer
Agricultural Subject Gateways
AGRIGATE
BIOME
NOVAGATE
AGNIC
AGRIS Internet Portal Contd.
Specialised information gateway maintained by FAO that provides a one stop access to relevant information on agriculture
Address information sharing, knowledge exchange and collaboration needs of Partners in Agricultural Community and and others such as the OAI
Host to the AGRIS Information System. This is network of islands of Agricultural Information
Host to other Agricultural Subject Gateways Hosts the AGRIS Multi-host Server
Agricultural Information System (AGRIS)
Co-operative information system of participating members mainly in Developing countries
Consists of references of literature produced within member country boundaries
Information processed and Maintained at FAO
Member countries to manage own resources
Ability to exchange information with other partners over the AGRIS Internet portal
AGRIS Centreat FAO HQ
AG
RIS
In
pu
t C
entr
es d
istr
ibu
ted
all
th
e w
orld
AGRIS Multi-Host Server
Location: Http://cfs.zadi.de/ Search Engine that allows parallel searching across
distributed bibliographical archives giving a one stop access to them without the need of centralising data
Developed in co-operation with ZADI (Zentralstelle für Agrardokumentation) in Germany
The archives are heterogeneous and have different data structure and metadata information
Develop common meta elements to homogenise search set results
ClientClient
AGRIS-ServerAGRIS-Server
DistributedDatabases
DistributedDatabases
Request Search Result
Search ResultsRequests
The AGRIS MHS System
Information Systems at FAO
AG standards Application Profile
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