Unidata's NetCDF Markup Language (NcML) as described in http://www.unidata.ucar.edu/software/netcdf/ncml/ gives the opportunity to change all information written in the CDM. With the --ncml.config option, the CDM will be configured immediately after reading a file. It is also possilbe to read in a ncml file with the --input.file=xxx.ncml option. In this case, the real data must be linked with the 'location' markup.
Input-files can and should be validated against the included ncml-2.2.xsd.