A solid is the basis for 3-dimensional geometry. The extent of a solid isdefined by the boundary surfaces as specified in ISO 19107:2003, 6.3.18. exterior specifiesthe outer boundary, interior the inner boundary of the solid.
Database handle for the object. It is of XML type ID, so is constrained to beunique in the XML document within which it occurs. An external identifier for the object inthe form of a URI may be constructed using standard XML and XPointer methods. This is doneby concatenating the URI for the document, a fragment separator, and the value of the idattribute.
<element name="Solid" type="gml:SolidType" substitutionGroup="gml:AbstractSolid"><annotation><documentation>A solid is the basis for 3-dimensional geometry. The extent of a solid is defined by the boundary surfaces as specified in ISO 19107:2003, 6.3.18. exterior specifies the outer boundary, interior the inner boundary of the solid.</documentation></annotation></element>