Quarterly Technical Report

January to March 2001

Introduction

At the end of March 2002, there were 24 repositories within the ASDD with a total of 31,043 dataset descriptions available for searching. Statistics are provided for the ASDD covering:

• web access statistics,
• gateway statistics,
• number of records at each repository,
• reliability of repository,

for the months of January, February and March 2002.

Repositories which have provided descriptions are also listed.

Achievements during past quarter

• A new repository, "Australian Natural Resources Data Library (ANRDL)", was made available to the ASDD gateway from the BRS server.
• The "Murray-Darling Basin Commission Documents" is still offline while it is changing Internet service providers.
• The "SAWMILL" software is being used to generate the web statistics.
• These quarterly reports are written in XHTML strict format and parsed using an XML parser.
• There were another 4% of XML records that parse than last quarter.
• There were 3 more nodes that use ANZMETA-1.3.DTD than last quarter.

Web Statistics for ASDD

This quarter's statistics for the ASDD are available for the period 2002-01-01 to 2002-03-31.

A summary of those statistics for this period follows:

More details are available for:

• Top 20 Pages
• Top 20 Visitor Domains
• Top 10 Australian Visitor Domains
• Top 40 Australian Government Visitor Domains

Gateway Usage

The following statistics are a summary of the ASDD basic and ASDD power gateways:

ASDD Basic Gateway

• Approximately 3700 searches were made through the ASDD basic gateway.
• Approximately 3200 single search terms were used.
• Approximately 400 multiple search terms were used.

The following links provide more details on the monthly gateway statistics:

• Basic gateway January 2002
• Basic gateway February 2002
• Basic gateway March 2002

ASDD Power Gateway

• Approximately 1700 searches were made through the ASDD power gateway.
• Approximately 450 single search terms were used.
• Approximately 650 multiple search terms were used.

The following links provide more details on the monthly gateway statistics:

• Power gateway January 2002
• Power gateway February 2002
• Power gateway March 2002

Repository Records

The following table lists the repositories, the DTD used, the number of records per repository and the number of XML records that parsed that were accessible at the beginning of April 2002. Note:

• These results take a long time to generate and may show different numbers to those of the monthly accesses. This could be due to nodes adding metadata to their repositories or some repositories not responding to the Z39.50 queries.
• "Not available" means that the server did not respond appropriately to the query at the time of investigation.
• "None" means that no DTD was provided in the XML records or no XML records were available.
• Only 65% of the records parse against a DTD.
• Only 7 repositories are using ANZMETA-1.3.DTD.
• Only 8 repositories have 100% valid records. Which is the same as last quarter.

Repository Reliability

A summary of repository reliability for the period January to March 2002 is given below:

Monthly details about the server, port, database, available records query time and repository availability can be found at:

January
February
March

Repository managers are automatically notified by email if a server goes down for a period longer than four hours.

Repository descriptions

ASDD repository descriptions http://www.ga.gov.au/asdd/tech/node/

It is the responsibility of each repository manager to utilise the online document management application to describe their repository and update the repository description whenever they choose.

The following ASDD repositories are briefly described and include references to further information ...

• Australian Antarctic Data Centre
• Australian Hydrographic Office - Product Metadata
• Australian Natural Resources Data Library (ANRDL)
• Australian Oceanographic Data Centre (Blue Pages)
• BRS - Incorporating Other Commonwealth Data
• CSIRO Marine Research
• EA Environmental Data Directory (Green Pages)
• Geoscience Australia (formerly AGSO)
• Geoscience Australia - National Mapping Division (formerly AUSLIG)
• IndexGeo Pty Ltd - Eco Companion catalogue
• NSW Natural Resources Data Directory
• NT Spatial Data Directory
• Qld Spatial Data (QSIIS)
• Queensland Department of Natural Resources and Mines Spatial Data
• South Australian Spatial Information Directory
• Tasmanian Spatial Data Directory
• Victorian Spatial Data Directory
• WALIS Interragator-Aerial photography
• WALIS Interragator-Environmental Impact Statements
• WALIS Interragator-Bibliographic Data
• WALIS Interragator-Natural Resource Monitoring
• WALIS Interragator-Spatial Data