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AUSTRALIAN GOVERNMENT LOCATOR SERVICE (AGLS)

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Presentation on theme: "AUSTRALIAN GOVERNMENT LOCATOR SERVICE (AGLS)"— Presentation transcript:

1 AUSTRALIAN GOVERNMENT LOCATOR SERVICE (AGLS)
Andrew Wilson National Archives of Australia

2 THIS TALK WILL COVER: What is metadata?
The origins and objectives of AGLS Dublin Core and the AGLS standard AGLS and recordkeeping metadata NAA as AGLS Maintenance Agency

3 METADATA A new term for something that has been around for a very long time Many different metadata applications: systems operating data management information management recordkeeping discovery and retrieval Categories overlap

4 WHY USE RESOURCE DISCOVERY METADATA?
TOO much material on the web information discovery is ineffective (high recall and low precision) BUT searchers want to find the resources that are relevant to their query high precision (relevant) results prevent information overload find non-electronic resources MEET needs by adding metadata to resources

5 ADDING STRUCTURED DESCRIPTION
Free text Structured Text Resource & metadata Database with schema Unsophisticated searching Sophisticated searching

6 METADATA IS: A way to add structured description to resources
An old idea from libraries (catalogues) and archives (archival control systems) Description of semantic content what resource is about searchers decide if useful help indexers understand resource Description of technical details how to retrieve and what formats conditions, history, and relationships

7 THE ORIGINS OF AGLS Report of the Information Management Steering Committee, August 1997 Recommended an Australian version of the Government Information Locator Service (GILS), to be called AusGILS AusGILS Workshop, December 1997, devised AGLS - based on Dublin Core not on GILS

8 AGLS INVOLVES COOPERATION BETWEEN:
THE NATIONAL ARCHIVES OF AUSTRALIA THE OFFICE FOR GOVERNMENT ONLINE [formerly the Office of Government Information Technology] ONLINE COUNCIL OFFICIALS

9 THE OBJECTIVES OF AGLS To improve the visibility and accessibility of government information and services through the standardisation of Web-based resource descriptions To enable Web-based search engines to do their job more efficiently To help ensure that those searching the Web are presented with relevant and meaningful ‘hits’ in response to search requests

10 AGLS AND DUBLIN CORE AGLS aims to achieve the objective of GILS by using the simplicity of Dublin Core Dublin Core is the emerging international standard for Web-based resource description Importance of interoperability between AGLS and Dublin Core Dublin Core is designed to be extensible AGLS is an extension of Dublin Core AGLS fits within the Warwick Framework

11 15 DUBLIN CORE ELEMENTS Title Creator Subject Description Publisher
Contributor Date Rights Type Format Identifier Source Language Relation Coverage

12 3 ADDITIONAL AGLS ELEMENTS
Function Describes the function/s of government to which the resource relates Availability Provides information on how the resource may be obtained (i.e. to go beyond discovery into retrieval) Audience describes the target audience of the resource

13 THREE CATEGORIES OF METADATA ELEMENTS
Ownership and creators of resources Intellectual content about resources Electronic or physical manifestation of the resource

14 AGLS ELEMENTS CATEGORISED

15 AGLS & QUALIFIERS (1) The current DC standard uses simple unqualified elements, e.g. <META NAME="DC.Title" CONTENT="Kita Yama (Japan)"> <META NAME="DC.Creator" CONTENT="Kertesz, Andre"> <META NAME="DC.Date" CONTENT="1968"> <META NAME="DC.Type" CONTENT="image"> <META NAME="DC.Format" CONTENT="image/gif"> <META NAME="DC.Identifier" CONTENT="http://foo.bar.zaf/kertesz/kyama">

16 AGLS & QUALIFIERS (2) AGLS uses a number of qualifiers in its implementation of DC Qualifiers are a way of being more specific about how metadata is to be interpreted AGLS qualifiers are “language”, “scheme”, plus various subelements

17 EXAMPLE OF QUALIFIED AGLS METADATA (HTML 4.0 SYNTAX)
<META NAME="DC.Identifier" SCHEME="URI" LANG="en" CONTENT="http://www.naa.gov.au/govserv/ER/index.htm"> <META NAME="DC.Creator.CorporateName" LANG="en" CONTENT="National Archives of Australia"> <META NAME="DC.Subject" SCHEME="APAIS" LANG="en" CONTENT=”computers, information retrieval, archives"> <META NAME="DC.Relation.Reference" SCHEME="URI" LANG="en" CONTENT="http://www.records.nsw.gov.au/erk/websites/websites.htm"> <META NAME="AGLS.Function" SCHEME="AAA" LANG="en" CONTENT="Information management - research - catalogues"> <META NAME="DC.Date.Modified" SCHEME="ISO8601" LANG="en" CONTENT=" ">

18 AGLS IS SIMPLE, FLEXIBLE AND DYNAMIC
Only 6 of the 18 elements are mandatory AGLS metadata can be created at point of document creation, but can be added to and improved as documents evolve or become more significant AGLS metadata can be linked to single items or to aggregates of resources Users can chose how much structure they want and what syntax they want to use

19 WHO OR WHAT CAN CREATE AGLS METADATA? (1)
AGLS metadata can be created automatically by: a software application such as a records management system or Web publishing software which has self-documenting capabilities a custom designed metadata generating tool such as DSTC’s ‘Reggie’

20 WHO OR WHAT CAN CREATE AGLS METADATA? (2)
AGLS metadata can be created by human beings such as: document authors, or ‘value-adders’ such as specialist knowledge representation experts

21 WHERE CAN AGLS METADATA BE STORED?
It can be embedded in a HTML document using HTML ‘metatagging’ It can be stored in a database or repository which can be interrogated by Web-based search engines using protocols such as Z39.50 or X.500 Very soon, once the Resource Description Framework (RDF) is finalised, it will be able to be stored using an XML DTD (Document Type Definition)

22 INDIVIDUAL AGENCIES WILL DETERMINE THEIR OWN DEPLOYMENT POLICIES AND PROCEDURES
Agencies will make business choices about: which resources to metadata (+ retrofitting) how much metadata will be created when the metadata will be created who will be responsible for metadata creation what metadata tools will be utilised where the metadata will be stored and how it will be accessed

23 AGLS AND RECORDKEEPING METADATA (1)
A high proportion of resources described by AGLS will be records Recordkeeping metadata also facilitates discovery and retrieval Therefore, AGLS metadata should have a lot in common with, and may even be a subset of, recordkeeping metadata

24 WHAT DOES RECORDKEEPING METADATA DO?
Enables identification and authentication Documents content, structure and context of records Administers conditions of access & disposal Documents use history and RK processes Enables discovery, retrieval and delivery Restricts unauthorised use Assures interoperability

25 EMERGING STANDARDS FOR ELECTRONIC RECORDKEEPING METADATA
University of British Columbia templates University of Pittsburgh metadata specifications for evidence in electronic recordkeeping (David Bearman) National Archives of Aust draft government recordkeeping metadata standard Monash University-led research project on recordkeeping metadata standards (SPIRT)

26 AGLS AND RECORDKEEPING METADATA (2)
Government recordkeeping metadata standards should dovetail neatly with AGLS to ensure a unified metadata regime for government Metadata can be a means of linking government electronic recordkeeping and online resource discovery Need for conceptual unity between AGLS and the Monash University Project

27 AGLS AND RECORDKEEPING METADATA (3)
Some AGLS metadata could be captured as part of the recordkeeping metadata capture process and then extracted for migration to a Web environment whenever necessary Particular AGLS elements (eg: Subject, Availability) could be created at the time of Web migration

28 IS AGLS WORTH THE EFFORT?
If it is worth publishing something on the Web it is worth linking it to metadata to ensure people can find it The government has made a commitment to having all appropriate government information and services available on-line by the year 2000

29 THE NATIONAL ARCHIVES AS AGLS MAINTENANCE AGENCY
Will convene a cross-jurisdictional AGLS Working Group Improvements to the User Manual Hardcopy version of the User Manual Development of an AGLS Website Liaison with Dublin Core and GILS communities Registration of schemes and extensions

30 WHERE CAN I FIND OUT MORE?
Web site: Andrew Wilson Adrian Cunningham (Director Recordkeeping and Descriptive Standards) FAX:

31 OTHER METADATA RESOURCES:
Dublin Core: Reg & Reggie (metadata editors): (+ links to other metadata schemas) Other metadata tools: Resource Description Framework (RDF):


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