We use Elasticsearch to store a vast amount of JSON documents in a specific format. Elasticsearch uses a strict schema to validate new items. Those documents ar

We use Elasticsearch to store a vast amount of JSON documents in a specific format. Elasticsearch uses a strict schema to validate new items. Those documents are generated and used by several downstream projects. We have a single JSON schema installable as a package in all of our projects which is used in unit tests, and converted to the Elasticsearch schema format for reindexing. Effectively, this ensures we only have compatible documents in the index; all applications running in prod are verified to be able to handle them. Thus, we use JSON schema as an universally valid way to exchange the data schema.