The 9 EDCS Dictionaries

• Classification Dictionary - the type of an environmental object
  • What is it, or how is it characterized?
    (BUILDING, RIVER, HARBOUR, …)

• Attribute Dictionary - the state of an environmental object
  • What are its additional clarifying characteristics?
    (BUILDING_FUNCTION, DEPTH, FREQUENCY, …)
  • What constraints are enforced on values?
    (ENUMERATION, LOGICAL, STRING, INTEGER, REAL, …)

• Attribute Value Characteristic Dictionary - attribute value characteristics
  • Applies to values of instances of EAs of all EDCS attribute value types or
  • Applies only to values of instances of EAs of EDCS attribute value type REAL, COUNT, INDEX, or INTEGER.

• Attribute Enumerant Dictionary - the enumerates of an enumerated attribute
  • For each entry in the EA Dictionary of EDCS attribute value type ENUMERATION, there is a set of entries in the EE Dictionary that specifies the allowed values of that EA Dictionary entry.
  • A set of nominal, ordinal or partitioned values
    ({ SHORT | MEDIUM | TALL }, { RED | GREEN | BLUE | .. }, ...)

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