Ontology of CF objects Uses mostly OWL classes and some SWRL rules to define subclasses of cfatt:Variables that have properties likely to be useful in crosswalking to other standards, e.g. having time dependence or geo-location.
Identifies a variable that contains closely associated data, e.g., the measurement uncertainties of instrument data.
This is an object version of cfatt:standard_name. The main reason for having it is that it is multivalued, i.e. standard_name objects can imply one another, while cfatt:standard_name is implicitly single valued (you must pick the most-specific version). While single-valued is OK for a data format, it is not OK for an inference network (you cannot pick the most specific one until you have all of them, and there is no way to write a rule within the scheme that fires after everyone else.) In doing an extraction from the RDF, however, there is no problem with pulling the most specific one, and letting the implications suffice for the rest.
Identifies auxiliary coordinate variables, label variables, and alternate coordinate variables.
Records dimensions which have been compressed by gathering.
Identifies a variable that defines a grid mapping.
Rule to find ordinate of a Projection Variable
Rule to find abscissa for a Gridlatlon coordinate
Rule to find abscissa of a Projection Variable
Rule to find ordinate of a Gridlatlon variable