AIXM (the XML-based exchange model for AIP by Eurocontrol and european AIS) defines the following properties for a VOR:
A code indicating the direction of the "zero bearing" provided by the station, values: "TRUE" (true north) or "MAG" (magnetic north).
The angular difference between the direction of the "zero bearing" indicated by the station and the direction of the True North.
The local angular difference between the True North and the Magnetic North.
The year the magnetic variation was measured.
Now say we have a VOR with the following values:
<codeTypeNorth>MAG</codeTypeNorth> <valMagVar>0.27</valMagVar> <dateMagVar>2018</dateMagVar>
Am I correct with the following statements?
valMagVaris a positive number, therefore magnetic north is east of true north.
codeTypeNorthis "MAG", therefore the VOR is aligned towards the magnetic north. Since the magnetic variation is +0.27°, the "zero bearing" is equally +0.27° east of true north and therefore the (undeclared)
valDeclinationmust be +0.27° as well.
Please don't comment on the practical relevance of this question. I'm developing and documenting OFMX (a derivative of AIXM) we will use as our future well-defined exchange format for https://openflightmaps.org and I want to be sure to be 100% sure I explain the terms "magnetic variation" and "magnetic declination" accurately in the OFMX documentation.
Thanks a lot for your help!