followed by a descriptive term such as "Related Information," "More Information," "Ordering Information," etc.
Use of Global Change Master Directory Controlled Vocabulary
The FGDC Metadata Standard allows use of one or several thesaurus lists for the Keyword field.
1.6 Keywords
1.6.1 Theme:
1.6.1.1 Theme Keyword Thesaurus:
1.6.1.2 Theme Keyword:
Note that one could use two defined thesaurus lists, and also have a third list that is uncontrolled and allows the describer of the data set to chose keywords as needed.
The NOAA standard is the 1996 Global Change Master Directory (GCMD) Vocabulary that is listed on:
http://gcmd.gsfc.nasa.gov/cgi-bin/mduser_dir/earth_sci_keywords
http://gcmd.gsfc.nasa.gov/valids/parameters_valids.html
The Theme Keyword Thesaurus entry should be:
1.6.1.1 Theme Keyword Thesaurus: GCMD DIF, Version 5.0a, September 1996: Parameter Keywords
Example:
1.6 Keywords
1.6.1 Theme: Parameter
1.6.1.1 Theme Keyword Thesaurus: GCMD DIF, Version 5.0a, September 1996: Parameter Keywords
1.6.1.2 Theme Keyword: EARTH SCIENCE > ATMOSPHERE > Aerosols > Carbonaceous Aerosols
1.6.1.2 Theme Keyword: EARTH SCIENCE > ATMOSPHERE > Aerosols > Cloud Condensation Nuclei
1.6.1.2 Theme Keyword: EARTH SCIENCE > SOLAR PHYSICS > Solar Energetic Particles > Particle Temperature
1.6.1.2 Theme Keyword: EARTH SCIENCE > SOLID EARTH > Economic Resources > Coal
1.6.1.2 Theme Keyword: INFOTERRA > Transportation > Water transportation > Transportation by ship
1.6.1.2 Theme Keyword: CIESIN > LAND AND FRESHWATER RESOURCES > SOIL CHARACTERISTICS > ORGANIC MATTER