<complexType name="SecondDefiningParameterType">
<annotation>
<documentation>Definition of the second parameter that defines the shape of an ellipsoid. An ellipsoid requires two defining parameters: semi-major axis and inverse flattening or semi-major axis and semi-minor axis. When the reference body is a sphere rather than an ellipsoid, only a single defining parameter is required, namely the radius of the sphere; in that case, the semi-major axis "degenerates" into the radius of the sphere.</documentation>
</annotation>
<choice>
<element ref="gml:inverseFlattening" />
<element ref="gml:semiMinorAxis" />
<element ref="gml:isSphere" />
</choice>
</complexType>
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