The attached Logical Model "FIXM_Core_v4.1.0_with_US_Extension_v4.2.0.eap" describes the structure, content, and format of FIXM US Extension v4.2.0 represented as a Universal Modelling Language (UML) model. The attached document "FIXM_US_Extension_v4_2_0_Logical_Model_Diagrams.pdf" contains images of the various classes contained in the UML files.
Please note the Sparx Systems Enterprise Architect Viewer is required to view the UML model, which can be downloaded from http://www.sparxsystems.com.
The FIXM US Extension v4.2.0 Operational Data Description serves as a catalogue of flight data elements (FDEs) that are expected to be exchanged using the FIXM US Extnesion. It provides a definition for those FDEs, as well as alternate names that reflect various nomenclatures across systems and domains, relationships among FDEs, data types, value ranges (where applicable), business rules associated with the individual use of each FDE, and references to authoritative documents where the FDEs can be found. This document is complementary to the other FIXM artifacts such as the FIXM models and the FIXM schemas.
The Operational Data Description is primarily intended as a reference for the FIXM development team, as its entries are not a one-for-one match to the Logical Model or Schema. FIXM users are encouraged to use the Schema Documentation provided above for details on the individual data elements in the final FIXM release.