This notation is intended for recording the value of the DCES element Coverage , particularly when using HTML meta elements. Introduction Several methods are available to indicate a place . If a name or geocode is used then the scheme from which that is selected determines valid values. However, there are no simple, commonly used, notations for the identifiers which use coordinates. The point may correspond to some place within an extensive region, such as the areal or volumetric centroid, but we do not specify the nature of the relationship in this document.
All components are optional.
2 Values are expressed as a text-string representing a number. If this component is absent then the value is undefined. Processors performing numeric comparisons are recommended to set values corresponding to maximally inclusive matching, i.e. the location is a line if one coordinate is missing, and a plane if two are missing. In this context the name is non-normative . In the case of a conflict, the place identified by the coordinate values takes precedence.