Simplified features from the aeronautical domain, such as aerodrome, runway, unit, and airspace.  These features are simplified representations of more complex aeronautical features found in AICM/AIXM that are used for storage or transmission.  <br /></p><p><br /></p><p>There are two independent issues involved in referencing aeronautical features:<br /></p><p><br /></p><p>1.  Using AICM/AIXM classes directly for these concepts would introduce a dependency on AICM/AIXM, which is a package of significant size and complexity<br /></p><p><br /></p><p>2.  Machine-readable, managed definitions for these concepts (such as the location, capabilities, and other information for the 'HTKJ' aerodrome) do not exist in a unified and authoritative form.  This information is managed independently, and sometimes inconsistently, by many organizations worldwide<br /></p><p><br /></p><p>The current version of this package is intended to address the needs for producers of meteorological information to be able to distribute the basic characteristics (identification, location, time, etc.) of their aeronautical information to consumers.  In many cases data producers are the best authority for up-to-date aeronautical information.  Downstream consumers may then use this information or ignore it.  <br /></p><p><br /></p><p>These concepts are represented in a way that is intended to be largely consistent with AICM/AIXM.<br /></p>