Public comment requested: OGC Encoding Linked Data Graphs in netCDF Files Standard (netCDF-LD)

Please note:  This Request is scheduled to close on 24 June 2022
Open Date: 
Wednesday, 2022-05-25
Closing Date: 
Friday, 2022-06-24


The Open Geospatial Consortium (OGC) seeks public comment on the candidate OGC Encoding Linked Data Graphs in netCDF Files Standard (netCDF-LD). NetCDF-LD is an approach for constructing Linked Data descriptions using the metadata and structures found in netCDF files. 

NetCDF is a format for encoding array-oriented scientific data, particularly in many Earth & Space Science domains. It is common practice to aid interoperability of netCDF files in the Earth sciences by using the Climate and Forecasting (CF) convention and also the Attribute Convention for Data Discovery (ACDD). Several communities are defining additional netCDF conventions for describing the semantics relating to their different domains. As the concurrent use of multiple – and possibly clashing or conflicting – netCDF conventions spreads, the problem of finding a common mechanism to validate and interpret metadata embedded inside netCDF files grows. The candidate netCDF-LD Standard offers a solution to that problem.

Linked Data (LD) is a World Wide Web Consortium best practice for encoding and publishing metadata to expose and connect data both within individual datasets and across multiple datasets. LD also allows dataset descriptions to become more useful by running semantically enabled queries across datasets. Linked Data uses the W3C Resource Description Framework (RDF) to express the information and relationships. Publishing netCDF file descriptions using LD methods presents the user community with an opportunity to benefit from LD’s improved exposure and connection and, in turn, make published data more Findable, Accessible, Interoperable, and Re-usable (FAIR).

The candidate netCDF-LD Standard provides a standard for encoding linked data semantics into netCDF files and interpreting netCDF files as RDF graphs with minimal or little changes to existing netCDF files. NetCDF files adopting the netCDF-LD standard and assembled into RDF graphs can be used with other Linked Data technologies for data fusion, powerful querying and data discovery. NetCDF-LD also enables the capture of enhanced netCDF metadata, enabling information found in netCDF files to be linked with published conventions and controlled vocabularies used to express the content, thus improving semantic interoperability and consistency.


Comments can be submitted to a dedicated email reflector for a thirty day period ending on the "Close request date" listed above, Comments received will be consolidated and reviewed by OGC members for incorporation into the document. Please submit your comments using the following link: requests [at] (Click here to submit comments) The link provided above should include a standard template in the message body. If the preloaded message body does not work properly using your mail client, please refer to the following template for the message body: Comments Template


You may wish to be added to the distribution list to receive comments as they are submitted

Subscribing to the the list will also allow you to view comments already received, which can be found in the List Archives.