(*) repeatable    + vocabulary (namespace+term)     # foreign key


EXPEDITION
    TYPE+ (marine, airborne, land, etc.)
    ID+
 (*)ALIAS (e.g. NGDC number, GCMD entry, UNOLS code)
        ID+
        AGENCY+ (organization)
    PLATFORM#
 (*)ACQUISITION_EVENT+
        TYPE+ (launch, line, station, etc.)
        ID+
        START_TIME
        START_POSITION (incl. reference system, longitude, latitude, elevation, position type, error estimate, etc.)
        STOP_TIME
        STOP_POSITION (incl. reference system, longitude, latitude, elevation, position type, error estimate, etc.)
        PLATFORM#   
 (*)OCCUPATION (e.g. stop at seaport, airport, city/town)
        TIME
        PLACENAME+ (from gazetteer)
 (*)PARTICIPANT
        TYPE+ (science, support, crew, etc.)
        ID# (person)
        ROLE+ (co-/chief scientist, student, technician, etc.)
        AFFILIATION# (organization)
 (*)FUNDING_INSTRUMENT
        TYPE+ (grant, contract, etc.)
        ID
        AGENCY# (organization)
 (*)PROJECT
 (*)DATA_SET
        DEVICE_OR_PROCESS_TYPE+ (classification e.g. “Sonar:Multibeam”, “Fluorometer”, “Visualization:3D”)
        DEVICE_OR_PROCESS_ID
            VENDOR (organization)
            MODEL/VERSION
            SERIAL#
     (*)PARAMETER+ (e.g. 1 device or process may produce N data types)
     (*)DATA_OBJECT
            TYPE+ (file, observation, sample)
            ID+
            PARENT_EVENT_ID+
        REPOSITORY# (organization)   
        INVESTIGATOR+ (funded/responsible person)
        CITATION+ (e.g. STD-DOI)
 (*)REFERENCE  (incl. title, authors, journal, volume, number, pages, year, DOI, etc.)
 (*)DOCUMENT
        TYPE+ (science report, engineering diagram, track plot, etc.)
        TITLE/CAPTION
        URL
        FORMAT+
 (*)RELATED_EXPEDITION+       

PLATFORM
    TYPE+ (ship, submersible, aircraft, etc)
    ID+
 (*)ALIAS (e.g. IMO call sign, military designation “AGOR-26” “WAGB-20”, IOC code)
        ID+
        AGENCY+ (organization)
    FULL_NAME
    OPERATOR# (organization)
    COUNTRY+
    PARENT_PLATFORM# (for e.g. submersible)  
    STATUS+

ORGANIZATION
    TYPE+ (academic, government, commercial)
    ID+
    FULL_NAME
    CONTACT# (person)

PERSON
    ID+
    FULL_NAME
    INSTITUTION# (organization)
    ADDRESS
    EMAIL
    PHONE
    STATUS+