You can access the [Feed Validator](https://developer.ott-highway.comcast.com/) through the OTT Highway portal to validate your XML files. Validation ensures there are no errors in your XML.

GMRSS stands for Golden Media RSS, an amalgam of MRSS and Merlin-specific extensions to aid ingest. 

Clients should send us batches of 1-5 gmrss items.

If you are a provider that contracts with GRACENOTE, you only need to send fields marked as "required."

In the case of linear metadata, if you provide a GRACENOTE station reference on the station, you need only provide ChannelLineup, Station, and Channel metadata. Listing and program metadata is handled by GRACENOTE.

You can validate against our spec using the validation API. There is a validation API for each version of the Open Ingest API. Please see the Validation section of the spec for details.