Description of the boundary at the base of the observed zone or interval, as definedin the location of the observation. Where the location is planar or volumetric andthe character of the boundary changes along its length or surface, the element canrepeat if the host type allows more than one. For a linear sampling feature only thefirst in document order applies, and any further ones are ignored.
<element name="baseBoundary" type="diggs:BoundaryPropertyType"><annotation><documentation>Description of the boundary at the base of the observed zone or interval, as defined in the location of the observation. Where the location is planar or volumetric and the character of the boundary changes along its length or surface, the element can repeat if the host type allows more than one. For a linear sampling feature only the first in document order applies, and any further ones are ignored.</documentation></annotation></element>