/**
     * This default mode for combining children DOMs during merge means that where element names match, the process will
     * try to merge the element data, rather than putting the dominant and recessive elements (which share the same
     * element name) as siblings in the resulting DOM.
     */
    @Deprecated(since = "4.0.0", forRemoval = true)
    String DEFAULT_CHILDREN_COMBINATION_MODE = XmlService.DEFAULT_CHILDREN_COMBINATION_MODE;

{* ../../docs_src/dependencies/tutorial007_py310.py hl[3,5] *}

## Sub-dependencies with `yield` { #sub-dependencies-with-yield }

You can have sub-dependencies and "trees" of sub-dependencies of any size and shape, and any or all of them can use `yield`.

**FastAPI** will make sure that the "exit code" in each dependency with `yield` is run in the correct order.

 * object.
 *
 * <p><b>Comparison to {@code java.util.Optional} (JDK 8 and higher):</b> A new {@code Optional}
 * class was added for Java 8. The two classes are extremely similar, but incompatible (they cannot
 * share a common supertype). <i>All</i> known differences are listed either here or with the
 * relevant methods below.
 *
 * <ul>
 *   <li>This class is serializable; {@code java.util.Optional} is not.

This schema definition includes your API paths, the possible parameters they take, etc.

#### Data "schema" { #data-schema }

The term "schema" might also refer to the shape of some data, like a JSON content.

In that case, it would mean the JSON attributes, and data types they have, etc.

#### OpenAPI and JSON Schema { #openapi-and-json-schema }

/// check | 확인

특별한 클래스를 만들지 않아도 되며, 이러한 것 혹은 비슷한 종류를 **FastAPI**에 "등록"하기 위해 어떤 곳에 넘겨주지 않아도 됩니다.

단순히 `Depends`에 넘겨주기만 하면 되며, **FastAPI**는 나머지를 어찌할지 알고 있습니다.

///

## `Annotated`인 의존성 공유하기 { #share-annotated-dependencies }

위의 예제에서 몇몇 작은 **코드 중복**이 있다는 것을 보았을 겁니다.

`common_parameters()`의존을 사용해야 한다면, 타입 명시와 `Depends()`와 함께 전체 매개변수를 적어야 합니다:

```Python
commons: Annotated[dict, Depends(common_parameters)]

      absl::Span<AbstractTensorHandle* const> output_gradients,
      absl::Span<AbstractTensorHandle*> result) const override;

  // Builds a tensor filled with ones with the same shape and dtype as `t`.
  absl::Status BuildOnesLike(const TapeTensor& t,
                             AbstractTensorHandle** result) const override;

  // Looks up the ID of a Gradient.

cooperation with the community in the case of network server software.

  The licenses for most software and other practical works are designed
to take away your freedom to share and change the works.  By contrast,
our General Public Licenses are intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users.

  When we speak of free software, we are referring to freedom, not

* Add a **JSON Schema** for the response, in the OpenAPI *path operation*.
    * This will be used by the **automatic docs**.
    * It will also be used by automatic client code generation tools.

在这个异常中，我们包含所需的作用域（如果有的话），以空格分隔的字符串（使用 `scope_str`）。我们把这个包含作用域的字符串放在 `WWW-Authenticate` 响应头中（这是规范要求的一部分）。

{* ../../docs_src/security/tutorial005_an_py310.py hl[106,108:116] *}

## 校验 `username` 与数据形状 { #verify-the-username-and-data-shape }

我们校验是否获取到了 `username`，并提取作用域。

然后使用 Pydantic 模型验证这些数据（捕获 `ValidationError` 异常），如果读取 JWT 令牌或用 Pydantic 验证数据时出错，就抛出我们之前创建的 `HTTPException`。

为此，我们给 Pydantic 模型 `TokenData` 添加了一个新属性 `scopes`。

在這個例外中，我們把所需的 scopes（若有）以空白分隔的字串形式（透過 `scope_str`）加入，並將該包含 scopes 的字串放在 `WWW-Authenticate` 標頭中（這是規格的一部分）。

{* ../../docs_src/security/tutorial005_an_py310.py hl[106,108:116] *}

## 驗證 `username` 與資料結構 { #verify-the-username-and-data-shape }

我們先確認取得了 `username`，並取出 scopes。

接著用 Pydantic 模型驗證這些資料（捕捉 `ValidationError` 例外），若在讀取 JWT token 或用 Pydantic 驗證資料時出錯，就丟出先前建立的 `HTTPException`。

為此，我們更新了 Pydantic 模型 `TokenData`，加入新屬性 `scopes`。