AIHW Knowledgebase Redevelopment project

Trish Ryan– Head, National Data Development Unit

Australian Institute of Health and Welfare– 02 6244 1054– trish.ryan@aihw.gov.au

Nigel Mercer– Consultant– 0412 063 024– nigel@littleoak.com.au

Metadata registry

• Australian Health, Community Services and Housing metadata registry

• ‘The Knowledgebase’ – developed 1997

• Implementation using 11179

• www.aihw.gov.au– Look for ‘Knowledgebase’

Project status

• Redevelopment project begun March 2003– Scope and issues paper prepared– Stakeholder and user consultation process

• Two main outcomes / opportunities– Considerable upgrade to website, including

significant help and assistance for metadata users and developers

– Metadata redevelopment, including incorporation of new version of ISO/IEC 11179

Functional requirements for website

• Identification of types of users

• Support for:– Metadata users– Metadata developers– Metadata registrar (maintainers)

– Metadata approvers

Functional requirements for website

• Education and guides for users and developers– About metadata– How to access and download metadata– How to develop and obtain

approval/endorsement– ‘Good’ metadata examples

Additional requirements

• Record users (optional)– Support users recording their interest in

individual metadata items

• Direct links (urls) to metadata items

• Can store ‘rich’ text e.g. formatting, tables, diagrams etc.

Additional requirements

• Track changes for candidate items i.e. how is this version different from the current one?

• Publish different dictionaries and reports from the metadata content (ability to specify templates for extraction and formatting)

Metadata maintainers

Metadata approvers

Metadata developersand stewards

Metadata users

The Knowledgebase

will need to…

Provide links to metadata not held

within the KB metadata registry

Assist users to understand metadata Assist developers to

create new metadata using help, guides

and templates

Assist metadata approvers to make

well-informed decisions on

metadata

Provide access to metadata, including browse, query, print

and extract/ download

Assist metadata registrars to register

and maintain metadata

Assist metadata registrars to produce

national data dictionaries and

other publications

Knowledgebase high-level functional model

Metadata maintainers

Metadata approvers

Metadata developersand stewards

Metadata users

The Knowledgebase

will need to…

Provide links to metadata not held

within the KB metadata registry

Assist users to understand metadata Assist developers to

create new metadata using help, guides

and templates

Assist metadata approvers to make

well-informed decisions on

metadata

Provide access to metadata, including browse, query, print

and extract/ download

Assist metadata registrars to register

and maintain metadata

Assist metadata registrars to produce

national data dictionaries and

other publications

Knowledgebase high-level functional model

Metadata user

Registrar

Maintain metadata items

Metadata developer

Create metadata

Upload candidates

Interest in metadata item

Record interest in metadata item

Metadata item candidate

Metadata item

Metadata item update

history

Software tool

Main KB functions

www user

KB

use

r in

terf

ace

Extract for publications

Opportunity for metadata redevelopment

• Realisation of benefits obtainable from considerable metadata reorganisation– Include metadata structures from new 11179– Expected to address a number of issues facing

national data development committees

Current status

• Considering metadata structures (architecture)

• Assessing workload and process to redevelop metadata content

• Building examples to show national data committees impact of proposed structures

Object class Registration status

Reg. Auth. MReg. Status MReg. Date M

Property

Data Element

Identifying and definitionalData element concept MName/identifier set Version Number MDefinition ORepresentationalValue domain ORepresentation class MRepresentation datatype MRepresentation layout MMaximum size CUnit of measure CUnit of measure precision CCollectionCollection setAdministrativeAdministrative set

Data Element Concept

Value domain

Identifying and definitionalName/identifier setDefinition ORepresentational

CollectionCollection setAdministrativeAdministrative set

Classification system

Identifying and definitionalName/identifier setDefinition MRepresentational

CollectionCollection setAdministrativeAdministrative set

Identifying and definitionalName/identifier setDefinition MRepresentational

CollectionCollection setAdministrativeAdministrative set

Identifying and definitionalName/identifier setDefinition MRepresentational

CollectionCollection setAdministrativeAdministrative set

Identifying and definitionalObject class MProperty MName/identifier setDefinition MRepresentational

CollectionCollection setAdministrativeAdministrative set

Metadata set

Project timetable

• February 2004 - Sign-off on new structures– Includes agreement on redevelopment process

• February-June - Develop protocol (business rules) for metadata registry

• March-September - Redevelop content

• August-November - Develop software

Current issues

• Object classes and properties– Classification systems for– Existing ontologies

• Number of moving parts– Versioning of all metadata item types

• XML integration

• Existing content redevelopment process