The gml:Grid implicitly defines an unrectified grid, which is a networkcomposed of two or more sets of curves in which the members of each set intersect themembers of the other sets in an algorithmic way. The region of interest within the grid isgiven in terms of its gml:limits, being the grid coordinates of diagonally opposed cornersof a rectangular region. gml:axisLabels is provided with a list of labels of the axes of thegrid (gml:axisName has been deprecated). gml:dimension specifies the dimension of the grid.The gml:limits element contains a single gml:GridEnvelope. The gml:low and gml:high propertyelements of the envelope are each integerLists, which are coordinate tuples, the coordinatesbeing measured as offsets from the origin of the grid along each axis, of the diagonallyopposing corners of a “rectangular†region of interest.
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.