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Welcome to the Global Change Master Directory, Software Version 9.7 ( MD9.7)

We have appreciated your feedback and ongoing interest in the directory through the years. Many of the upgrades integrated in MD9.7 are the result of user feedback.   The additions and changes to the directory are listed in the "GCMD's MD9.7 Version Release (April 2007)".    Highlighting MD9.7 is a redesigned web site, along with reconfigured metadata displays.    With the increase in metadata content, the keyword taxonomies have been deepened and extended to help users further refine the search.  Please note the addition of a new Science Topic and the ability to navigate a five-level hierarchy of keywords. [See "Disclaimer" below.]

Greater emphasis has been placed on direct access to data and services through the "Get Data" and "Get Services" tabs within the DIF and SERF records.   In addition, the docBUILDER authoring tools have been strengthened to focus on the importance of platforms and instruments employed in the collection of data.   These descriptions are now known as: Ancillary Descriptions for Instruments (AD-I) and Ancillary Descriptions for Platforms (AD-P)'s.   The keywords associated with ancillary descriptions, such as these, also serve as valuable refinements in the search for data.

Disclaimers:
The GCMD's Earth science keyword taxonomies were developed over more than a decade and continue to evolve.   The taxonomies are used for the search and retrieval of Earth science data-related information from the GCMD database and are therefore limited by the breadth and depth of current content.  Keywords are added when needed to cover new science-focused content.

The keywords for many data set descriptions (DIFs) have been re-mapped to the new five-level taxonomy: Topic, Term, Variable_1, Variable_2, Variable_3, and Detailed Variable.   Many science keyword changes are related to the availability of these new levels; other changes are related to the addition of the new Biological Classification Topic.   Services keywords have undergone change but have not yet been extended beyond their original two-level hierarchy. The Keyword Subscription service will resume TBD.

Additional keyword changes are planned in the near future to capitalize on the new 5-level taxonomy.   To review/change keywords in your metadata records, simply use the "Update" button when viewing your DIFs.   Alternatively, you may contact one of the science coordinators (see Staff Page).

Your responses to MD9.7 are welcome.   Please ask any questions or report any problems to our GCMD User Support representative, Kathleen Moreland.

Thank you.   We hope you enjoy the new look and functionality of the directory.
Lola M. Olsen, GCMD Project Manager, and the GCMD Staff

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Last Updated: May 2008