---
title: "Metadata FAQs"
slug: "metadata-faqs"
tags: ["Metadata"]
updated: 2025-08-14T13:26:16Z
published: 2025-08-14T13:26:16Z
canonical: "docs.developer.comcast.com/metadata-faqs"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.developer.comcast.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Metadata FAQs

#### How do I validate my XML?

See [Validating Your Metadata Syntax](/docs/validate-your-metadata-feed) for instructions. You can access the [Metadata 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.

#### What is GMRSS?

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

#### How many assets should I send per payload?

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

#### What metadata do I need to send if I provide GRACENOTE references?

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.

#### How do I know if I have a correct GMRSS sample?

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.