{
  "index_patterns": ".test-${test.template.version}",
  "mappings": {
    "doc": {
      "_meta": {
        "template.version": "${test.template.version}"
      },
      "properties": {
        "${test.template.field_1}": {"type": "keyword"},
        ${test.template.field_2}
      }
    }
  }
}