extensions/json-schema/services/src/main/resources/META-INF/cxs/schemas/values/email.json

{
    "$id": "https://unomi.apache.org/schemas/json/values/email/1-0-0",
    "$schema": "https://json-schema.org/draft/2019-09/schema",
    "title": "Email",
    "type": "string",
    "format" : "email"
}