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

Nature and Role of Metadata u Metadata - structured information about data u 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 u 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 u 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) u Metadata system (metadatabase) is in reality a searchable Data Catalogue (Data Inventory, Data Index). Metadata records (dataset descriptions)

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

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

Metadata Entry u web interface (no dedicated client needed), but domain-restricted (visible only to permitted domains) and username+password required to log on u user can create new record from scratch or by cloning an existing one, or edit any record he/she currently “owns” u 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 u 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)

Metadata Query u 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 u 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 u 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 u 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 u 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).

Metadata / Database Administration u 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. u 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

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

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

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

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

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

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

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

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

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

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

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