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Requirement

 Requirement [+]

Title

Information definition

Identifier

SWIM-SERV-022

Requirement

A service description shall describe the elements of the exchanged information including:

  • the name of the element;
  • the definition of the element;
  • the cardinality applicable to the element, including whether the element is optional, conditional or mandatory in the exchange;
  • constraints applicable to the element, such as:
    • datatype;
    • value ranges;
    • special values;
    • character set restrictions;
  • the semantic correspondence of the element with the AIRM; and
  • the structure and relevant relationships between the elements.

Rationale

This requirement ensures that the precise meaning of the exchanged information is shared by all parties of the information exchange.

Verification

Completeness: Verify that the service description describes all elements of the exchanged information and that the required details are provided.

Consistency: Verify that the elements are consistent with each other and with the AIRM concepts used in the semantic correspondence.

Correctness: Not Applicable.

Examples/Notes

Note: The service description must describe all elements of the exchanged information at all levels, down from the service operation parameters to attributes and data types.

Note: It is best practice to base the information definition  on the requirements found in the EUROCONTROL Specification for SWIM Information Definition [RD 2], ensuring that it contains the extra details required by this requirement.

Note: The information definition can be provided by reference, for example when using an AIRM conformant standardised information exchange models, such as Aeronautical Information Exchange Model (AIXM) [RD 15] and ICAO Meteorological Information Exchange Model (IWXXM) [RD 16].  

Level of Implementation

Mandatory

Guidance

No guidance provided.
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