Item Validation
Newly created items are considered invalid for publishing until certain criteria are met. Each time new data is added to the item, a check is performed to see if the item has met those requirements, and if it has, the item will be automatically considered valid for publishing.
Each item has a meta field used to store statuses, flags and other arbitrary values, including whether the item is or isn’t valid.
The default value of the metadata for a newly created item looks like:
{_version: 1,data: { flags: { isValid: false, }, settings: {}}}