This property element either references a solid via the XLink-attributes or contains the solid element. A solid element is any element, which is substitutable for gml:AbstractSolid.
<element name="solidMember" type="gml:SolidPropertyType"><annotation><documentation>This property element either references a solid via the XLink-attributes or contains the solid element. A solid element is any element, which is substitutable for gml:AbstractSolid.</documentation></annotation></element>