NDD (National Oceans Office Data Directory) development overview as at 1 July 2002

1. NDD (National Oceans Office Data Directory) development overview as at 1 July 2002 Tony Rees/Miroslaw Ryba CSIRO Marine Research, Hobart

2. Nature and Role of Metadata • Metadata - structured information about data • Typically follows an established standard for “core” metadata (to support interoperability and metadata exchange) -- in Australia/NZ: the ANZLIC standard -- plus additional community- or agency-specific information as needed • Metadata useful for ... - dataset discovery (“search metadata”) - including searchable keywords, space and time criteria, etc., assigned by metadata author (or harvested from the dataset in some cases) - dataset description - including ancillary information not present in the dataset - data access - e.g. via contact details and/or online links • Metadata records can take the form of static documents (e.g. text files, SGML/XML records, static HTML pages) or dynamically generated ones (components held in a database and assembled as needed - as per MarLIN and NDD) • Metadata system (metadatabase) is in reality a searchable Data Catalogue (Data Inventory, Data Index). Metadata records (dataset descriptions)

3. Metadata elements in the NDD (as at 1 July 2002) • Attributes • Limitations • Stored Data Volume • Projection Details • Model Details: • Model Name • Model Custodian • Model Developer (Organisation) • Model Description • Model Development Date • Model Revision Date • Model Update Frequency • Model Logical Consistency • Model Critical Data • Model Data Flow • Model Interpretation • Model Verification • Model Validation • Model Limitations • Model Language • Model Environment • Model Output • ANZLIC ID • Title • Custodian • Jurisdiction • Abstract • Search Words (=ANZLIC Themes) • Location Keywords (GEN Name, Category, Jurisdiction) • Bounding Polygon • Bounding Box (N, S, E, E Bounding Coordinates) • Beginning Date • Ending Date • Progress • Maintenance & Update Frequency • Stored Data Format • Available Data Format • Access Constraint • Lineage • Positional Accuracy • Attribute Accuracy • Logical Consistency • Completeness • Contact Organisation • Contact Position • Mail Address (Locality, State, Country, Postcode, Telephone, Fax, Email) • Metadata Date • Additional Metadata • NDD Record Number • Short Title • Originator Organisation(s) • Contact Person • Metadata Creator • Metadata Creation Date • Metadata Updater • Metadata Last Update Date • Metadata Owner (= who can edit) • Metadata Status (Unrestricted / Internal / Private) • www links (documents, graphics, or data) • Cell Size, Unit (for gridded data) • Scale Denominator (for maps) • Keywords (including Habitat, Taxonomy as subsets), extended to cover NOO interests • Additional Keywords (free text) • Species References (CAAB codes + names) • C-squares spatial indexing / spatial extent display + + NOO-requested Metadata Elements Custom Metadata Elements from MarLIN Metadata records (dataset descriptions) ANZLIC Metadata Elements

4. Basic Metadata System Overview Metadata query / request intermediate screens (e.g. resultsets) Metadata entry Metadata repository Metadata records Metadata export / sharing (e.g. via ASDD) Metadata / DB administration

5. Metadata Entry • web interface (no dedicated client needed), but domain-restricted (visible only to permitted domains) and username+password required to log on • user can create new record from scratch or by cloning an existing one, or edit any record he/she currently “owns” • user enters a mix of: - free text, numbers, dates, URL’s (e.g. data or graphic links) as applicable - controlled terms or options (pick from pre-formatted lists) - references to details in accessory tables (e.g. persons, organisations) - entered once, re-used as necessary • user can preview entered metadata in “final” form, and then choose to publish the record, save “in progress”, or delete unpublished entry (deleting published records requires administrator-level privileges)

6. Metadata Query • web interface (no dedicated client needed), but some records domain-restricted (visible only to permitted domains) and others can be username+password protected if needed • user can choose between: - “user-defined” (=structured) search - by keywords, ANZLIC Themes, Originator Organisations, etc, plus space and time criteria if desired - “list datasets” - i.e. alphabetic index, or list by creation or update date (most recent first) - free text search of either whole record, title only, or dataset number • intermediate screens (resultsets organised by keyword or other desired term) are presented for “user-defined search”, and can be re-queried by other categories without returning to the original starting point • whole metadata record for any dataset is accessible by clicking on the relevant title; can also be included as a direct hyperlink in any other digital document • Data files, documents or graphics can be accessed directly from the metadata record via hyperlinks (can be password protected, etc., if so designated on the destination server).

7. Metadata / Database Administration • mostly web interface (no dedicated client needed), but some parts domain-restricted (visible only to permitted domains) and “super-user” username+password protected. Some specialised tasks may require direct access to the database using SQLplus or MS Access interface. • Sample administration tasks include: - control of usernames and user privileges for metadata editors - control of record ownership (e.g. transfer from creator to other user) - edit access to all records to correct errors or alter style, etc., or perform global updates - delete “published” records e.g. in response to user requests - review web access logs and auto-generated use statistics - maintain and/or extend content of pre-defined lists (e.g. keywords) - add, remove or modify computer domains considered “internal” - perform custom import or export functions as necessary

8. current Home Page (NDD, MarLIN) as at 1 July 2002

9. current Edit entry point (NDD, MarLIN) as at 1 July 2002 (etc.)

10. current Edit screen - 2 (NDD, MarLIN) as at 1 July 2002

11. current Edit screen - 3 (NDD, MarLIN) as at 1 July 2002

12. current Edit screen - 4 (NDD, MarLIN) as at 1 July 2002 (etc.) (etc.)

13. current “User-Defined” Search screen - 1 (NDD, MarLIN) as at 1 July 2002

14. current “User-Defined” Search screen - 2 (NDD, MarLIN) as at 1 July 2002 (etc.) (etc.)

15. current “List Datasets” Search screen - (NDD, MarLIN) as at 1 July 2002

16. current “Text / Number Search” Search screen - (NDD, MarLIN) as at 1 July 2002

17. current Search result screen - (NDD, MarLIN) as at 1 July 2002 (etc.)

18. current full record display - (NDD, MarLIN) as at 1 July 2002 (etc.) (etc.)