NcML: NetCDF XML

From the website:

NcML is an XML representation of netCDF metadata. It is similar to the netCDF CDL (network Common data form Description Language), except that it uses XML syntax. An NcML file essentially contains the same header information one gets from a netCDF file with the "ncdump -h" command.

NcML OBJECT MODEL:

An abstract object model for expressing metadata associated with generic netCDF data

NcML Coordinate System:

NcML Coordinate System extends the netCDF data model to add explicit support for general and georeferencing coordinate systems

NcML Dataset:

NcML Dataset allows you to use NcML to define a netCDF file, similar to the ncgen command line tool, as well as to redefine, aggregate, and subset existing netCDF files.