Specialized observations<br /></p><p><br /></p><p>Where a property of the feature of interest is invariant, the corresponding observation result is a scalar (e.g. mass, length, temperature), or a record whose components correspond to a thematic decomposition of the observed property (e.g. bands of a spectrum, components of a wind-velocity vector, components of a stress tensor, elements of a geometry). Where a standard model for the observed property is available, this may be used for the result (e.g. observations of position, shape, or time should use GM_Object and TM_Object). <br /></p>