{
  "title": "timestamp with now",
  "id": "schemas/common/timestampWithNow",
  "$schema": "http://json-schema.org/draft-04/schema#",
  "description": "ISO format yyyy-mm-dd HH:MM[:SS] or now or now + HH:MM[:SS] or now + SECONDS",
  "type": "string",
  "oneOf": [
    {
      "pattern": "now(\\s*\\+\\s*(\\d+|\\d{1,2}:\\d{1,2}(:\\d{1,2})?))?"
    },
    {
      "format": "date-time"
    }
  ]
}