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Australian Spatial Data Directory (ASDD)

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Modified: 2009-12-07

ASDD documentation and resources

This is a concise guide to the various documentation and resources that comprise the Australian Spatial Data Directory (ASDD). The areas of interest are:
Architecture and technologies | Metadata management | Z39.50 protocol | Organisations establish nodes

Architecture of the ASDD

  • Architecture and technologies - A brief description of technologies behind the ASDD. Explains each component. The architecture diagram shows how it all fits together.

Metadata management

  • XML metadata - Each dataset description is a concise summary document in the plain-text eXtensible Markup Language (XML). The document must comply with the structural rules defined by the ANZMETA XML Document Type Definition (DTD).
  • Controlled vocabularies - various authority lists for keywords and Geographic Extent Names.
  • Build upon ANZLIC metadata - The XML metadata can be extended to cater for additional metadata and for local data management. This capability starts with version 1.2
  • OASIS Catalog - A mechanism for your XML parser to find the local copies of Document Type Definitions (DTDs) and character entity sets.
  • Please discuss geospatial metadata and ASDD issues on the OZMETA-L geospatial metadata listserver and the ASDI-L listserver.
  • Validate your XML documents.
  • XML document validation tool.
  • A RELAX NG XSD is used by the validation tool to validate the content of anzmeta-1.3.dtd XML document instances that are compliant to the ANZLIC metadata guidelines version 2.0.

Z39.50 search and retrieve protocol

Organisations establish nodes

It is the responsibility of individual nodes to maintain their metadata in accordance with the relevant standards.

  • Requirements and Standards - Concise overview of the criteria for participation as a node of the ASDD.
  • Node Managers interface - For node managers to prepare their high-level node descriptions, and access various resources and log files. When a node manager intends to establish a new ASDD node they will describe it with a node description. This is a password controlled area for document preparation and access to various online services to assist with node management. (Note that this is *not* for metadata authors, see metadata management section above.)
  • Implementing new ASDD nodes - Detailed explanations about how to implement new nodes using various Z39.50 server software, including requirements, configuration and server options.
  • Establishing individual ASDD nodes - This high-level explanation shows how any organisation can participate. Provides "how to" dot points for setting up a server. Case studies show how some other organisations have done it and estimate resources that are involved.
  • Upgrading existing ASDD Isite nodes - Provides recent software and configuration files for Z39.50 servers that use Isite. Explains the upgrade procedure.
  • Testing your node - it is not sufficient to just install the software. You need to also ensure that it is properly configured and reliably answers all queries. It needs to automatically re-start when the machine reboots. You need to ensure that search queries from any host can reach your node (just like your web server, no firewall). Testing tools and strategies are dependent on your particular brand of Z39.50 server (Isite, MetaStar, Zebra). Please ensure proper configuration before asking for your node to be added to the ASDD gateways.
  • Testing Isite ASDD nodes - Provides some hints for testing your Z39.50 server.
  • You should monitor your own node for failures. If you do not, then the ASDD Status of Nodes application has an error log which might help a little (status-200912.err).
  • ASDD implementation overview - Provides a brief overview of how the ASDD operates and the current status of its implementation.
  • The quarterly reports will help you to improve your search service.