{
  "type": "string",
  "pattern": "[a-zA-Z0-9._%+@-]+",
  "minLength": 1,
  "maxLength": 256,
  "$schema": "https://json-structure.org/meta/core/v0/#",
  "name": "EntityIdentifier",
  "$id": "https://raw.githubusercontent.com/api-evangelist/amazon-workmail/refs/heads/main/json-structure/workmail-entity-identifier-structure.json",
  "description": "EntityIdentifier schema from Amazon WorkMail API"
}