chacha20Poly1305ID = "******@****.***"
	gcm256CipherID     = "******@****.***"
	aes128cbcID        = "aes128-cbc"
	tripledescbcID     = "3des-cbc"
)

// https://cs.opensource.google/go/x/crypto/+/refs/tags/v0.22.0:ssh/common.go;l=46
// preferredKexAlgos specifies the default preference for key-exchange
// algorithms in preference order. The diffie-hellman-group16-sha512 algorithm

```

この設定では、自動APIドキュメントは以下の様になります:

<img src="/img/tutorial/metadata/image01.png">

## タグのためのメタデータ

さらに、パラメータ `openapi_tags` を使うと、path operations をグループ分けするための複数のタグに関するメタデータを追加できます。

それぞれのタグ毎にひとつの辞書を含むリストをとります。

それぞれの辞書は以下をもつことができます:

* `name` (**必須**): *path operations* および `APIRouter` の `tags` パラメーターで使用するのと同じタグ名である `str`。
* `description`: タグの簡単な説明文である `str`。 Markdownで記述でき、ドキュメントUIに表示されます。
* `externalDocs`: 外部ドキュメントを説明するための `dict`:

## Dokumentations-Tags – OpenAPI

Um Tags zu Ihren *Pfadoperationen* hinzuzufügen und diese in der Oberfläche der Dokumentation zu gruppieren, lesen Sie die Dokumentation unter [Tutorial – Pfadoperation-Konfiguration – Tags](../tutorial/path-operation-configuration.md#tags){.internal-link target=_blank}.

## Zusammenfassung und Beschreibung in der Dokumentation – OpenAPI

      this.method = request.method
      this.body = request.body
      this.tags =
        when {
          request.tags.isEmpty() -> mapOf()
          else -> request.tags.toMutableMap()
        }
      this.headers = request.headers.newBuilder()
      this.cacheUrlOverride = request.cacheUrlOverride
    }

    open fun url(url: HttpUrl): Builder =
      apply {
        this.url = url
      }

	cmd := &cobra.Command{
		Use:   "tag",
		Short: "Command group used to interact with revision tags",
		Long: `Command group used to interact with revision tags. Revision tags allow for the creation of mutable aliases
referring to control plane revisions for sidecar injection.

With revision tags, rather than relabeling a namespace from "istio.io/rev=revision-a" to "istio.io/rev=revision-b" to

		entry.API.TimeToResponseInNS = strconv.FormatInt(timeToResponse.Nanoseconds(), 10)
		// We hold the lock, so we cannot call reqInfo.GetTagsMap().
		tags := make(map[string]interface{}, len(reqInfo.tags))
		for _, t := range reqInfo.tags {
			tags[t.Key] = t.Val
		}
		entry.Tags = tags
		// ignore cases for ttfb when its zero.
		if timeToFirstByte != 0 {

func TestTestTags(t *testing.T) {
	noTags := Filter{
		set: true,
		And: And{
			Tags: []Tag{},
		},
		andSet: true,
	}

	oneTag := Filter{
		set: true,
		And: And{
			Tags: []Tag{{Key: "FOO", Value: "1"}},
		},
		andSet: true,
	}

	twoTags := Filter{
		set: true,
		And: And{
			Tags: []Tag{{Key: "FOO", Value: "1"}, {Key: "BAR", Value: "2"}},
		},
		andSet: true,
	}

                    default_response_class,
                    self.default_response_class,
                )
                current_tags = []
                if tags:
                    current_tags.extend(tags)
                if route.tags:
                    current_tags.extend(route.tags)
                current_dependencies: List[params.Depends] = []
                if dependencies:

    ```

## Set-Typen

Aber dann denken wir darüber nach und stellen fest, dass sich die Tags nicht wiederholen sollen, es sollen eindeutige Strings sein.

Python hat einen Datentyp speziell für Mengen eindeutiger Dinge: das <abbr title="Menge">`set`</abbr>.

Deklarieren wir also `tags` als Set von Strings.

=== "Python 3.10+"

    ```Python hl_lines="12"

<img src="/img/tutorial/generate-clients/image05.png">

## FastAPI App with Tags

In many cases your FastAPI app will be bigger, and you will probably use tags to separate different groups of *path operations*.

For example, you could have a section for **items** and another section for **users**, and they could be separated by tags:

=== "Python 3.9+"

    ```Python hl_lines="21  26  34"