1. The Proliferation of Metadata Standards and the Evolution of NASA’s Global Change Master Directory (GCMD) Standard for Uses in Earth Science Data Discovery Jianping Mao & GCMD team ESIP Federation Meeting January 9-10, 2008

2. ROSCOP/CSR MARC ANZLIC DIF EDMED DCMI FGDC/CSDGM DIDG EDDF ISO19115/ NAP* 1960 1970 1980 1990 2000 Metadata Standards 1960: ROSCOP/CSR (Report of Observations/Samples collected by Oceanographic Programmes Cruise Summary Report) 1970: MARC (Machine-Readable Cataloging) 1986: Australia New Zealand Land Information Council (ANZLIC) 1988: Directory Interchange Format (DIF) 1991: European Directory of Marine Environmental Datasets (EDMED) 1994: Dublin Core Metadata Initiative (DCMI) 1994: US Federal Geographic Data Committee (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM) 1995: Directory Information Describing Geo-referenced Datasets (DIDG) 2001: NOAA/NODC Electronic Data Description Format (EDDF) 2003: ISO-19115 Geographic Information Metadata International Standard > ISO North American Profile (NAP)

3. Over 100 DIF in the prototype NMD database. 8788 DIF was formally approved and adopted by a CI science advisory group. 89 The CEOS Data Working Group (DWG) began attending the CI Workshop meetings and provided valuable feedback on the DIF structure. DIF History

4. IWGDMGC adopted the directory as a prototype to facilitate global change research 90 The NMD was renamed the GCMD for its Earth sciences applications. 91 The GCMD was selected to serve as NASA's FGDC Clearinghouse node for geospatial metadata. 94 DIF History

5. Complied ISO 19115/TC211 geospatial metadata standard 0407 MD 9.7 The DIF is evolving through input from the user community. DIF History

6. The GCMD Standard for metadata DIF: the Directory Interchange Format Provides “controlled vocabulary” and searching capability Offers an intuitive online authoring tool for creating and validating metadata Complies with FGDC and ISO metadata standards (“container” and “transformer”, XSLT)

7. What is a DIF Evolves to capture additional fields that are useful within the user community

8. Required Fields: Entry ID Entry Title Science Keywords ISO Topic Category Data Center Summary Metadata Name Metadata Version Recommended Fields: Data Set Citation Personnel (DIF Author) Instrument Platform Temporal Coverage Spatial Coverage Location Data Resolution Project Quality Access Constraints Use Constraints Distribution Related URL DIF Revision History Optional Fields: Keyword Paleo-Temporal Coverage Data Set Progress Data Set Language Originating Center Multimedia Sample Reference Parent DIF IDN Node DIF Creation Date Last DIF Revision Date Future DIF Review Date DIF and FGDC CSDGM Metadata *Mandatory FGDC fields *Mandatory under certain conditions or optional FGDC fields

9. Required Fields: Entry ID Entry Title Science Keywords *ISO Topic Category Data Center Summary *Metadata Name *Metadata Version Recommended Fields: Data Set Citation -Dataset Title -Dataset Release Date Personnel (DIF Author) Instrument Platform Temporal Coverage Spatial Coverage Location Data Resolution Project Quality Access Constraints Use Constraints Distribution Related URL DIF Revision History Optional Fields: Keyword Paleo-Temporal Coverage Data Set Progress Data Set Language Originating Center Multimedia Sample Reference Parent DIF IDN Node DIF Creation Date Last DIF Revision Date Future DIF Review Date *Fields added for ISO19115 compliance *Mandatory ISO fields *Mandatory under certain conditions or optional ISO fields DIF and ISO 19115 Core Metadata

10. DIF Population Growth Holds over 19,000 metadata records (> 20 petabytes of data )

11. DIF Population by Earth Science Topic

12. Searches by Controlled Keyword 4/2000 – 12/2007

13. ESIP DIFs in GCMD

14. GCMD Overview Support NASA and NASA’s partners: EOSDIS, ESIP, CEOS/IDN, FGDC/CSDGM an online catalog for descriptions of NASA’s space and Earth science data sets a metadata discovery system for Earth science data and data-related services

15. The GCMD and What’s New

18. AW Stats – Total Hits

19. AW Stats – Unique Visitors

20. Map/Date Search Combines Spatial, Temporal & Full-Text Search

21. Query Refinement Example 1.Query by Science Keyword:  Atmosphere > Air Quality > Carbon Dioxide

22. Query Refinement Example 2.Refine by Project [ESIP] :3. Results

24. What is a SERF? SERF (Service Entry Resource Format) Describes Earth science related tools, software, and services. Provides direct links to analysis, visualization, and processing software; online programs; and geospatial web services. Links between services and associated data set descriptions.

25. SERF Population Growth

26. SERF Population by Service Topic

27. ESIP SERFs in GCMD