1<!ELEMENT antenna (azimuth, elevation)>
2<!ELEMENT azimuth (gainsample+)>
4 unit (rad|deg) #IMPLIED
5 format (linear|dBi) #IMPLIED
6 symmetry (mirrored|none) #IMPLIED>
7<!ELEMENT elevation (gainsample+)>
9 unit (rad|deg) #IMPLIED
10 format (linear|dBi) #IMPLIED
11 symmetry (mirrored|none) #IMPLIED>
12<!ELEMENT gainsample (angle, gain)>
13<!ELEMENT angle (#PCDATA)>
14<!ELEMENT gain (#PCDATA)>