{* ../../docs_src/separate_openapi_schemas/tutorial001_py310.py ln[1:15] hl[14] *}

...then the `description` field will **not be required**. Because it has a default value of `None`.

### Input Model in Docs { #input-model-in-docs }

You can confirm that in the docs, the `description` field doesn't have a **red asterisk**, it's not marked as required:

<div class="screenshot">

          <name>description</name>
          <description>The description of what this expression references, and what it's generally used for.</description>
          <type>String</type>
          <required>true</required>
        </field>
        <field>
          <version>1.0.0</version>
          <name>configuration</name>

  <version>0.0.0.0</version>
</parent>
    ]]></configuration>
    <description> This is the MavenProject instance for the parent of the current POM.
    </description>
  </expression>
  <expression>
    <syntax>project.file</syntax>
    <description> This is the File instance that refers to the location of the current POM on
      disk.
    </description>
  </expression>
  <expression>
    <syntax>project.artifacts</syntax>

			Description:    e.Error(),
			HTTPStatusCode: http.StatusBadRequest,
		}
	case AdminError:
		apiErr = APIError{
			Code:           e.Code,
			Description:    e.Message,
			HTTPStatusCode: e.StatusCode,
		}
	case SRError:
		apiErr = errorCodes.ToAPIErrWithErr(e.Code, e.Cause)
	case decomError:
		apiErr = APIError{
			Code:           "XMinioDecommissionNotAllowed",
			Description:    e.Err,

      <name>CoreExtensions</name>
      <description>Extensions to load.</description>
      <version>1.0.0+</version>
      <fields>
        <field>
          <name>extensions</name>
          <description>A set of build extensions to use from this project.</description>
          <version>1.0.0+</version>
          <association xml.itemsStyle="flat">

-   type: dropdown id: source attributes: label: Source description: Tensorflow
    installed from options: - source - binary validations: required: true

-   type: input id: tfversion attributes: label: Tensorflow Version description:
    placeholder: ex,. tf 2.8 validations: required: true

-   type: dropdown id: Code attributes: label: Custom Code description:
    options: - "Yes" - "No" validations: required: true

        name = "Start Release Cycle"
        description = "Promotes a successful build on master as the start of a new release cycle on the release branch"

        params {
            text(
                "gitUserEmail",
                "",
                label = "Git user.email Configuration",
                description = "Enter the git 'user.email' configuration to commit change under",

          <version>3.0.0+</version>
          <required>true</required>
          <description>The full name of the project.</description>
          <type>String</type>
        </field>
        <field>
          <name>description</name>
          <version>3.0.0+</version>
          <description>A detailed description of the project, used by Maven whenever it needs to

assignees: ''

---

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**Additional context**

      <version>1.0.0+</version>
      <description>A custom lifecycle mapping definition.</description>
      <fields>
        <field>
          <name>id</name>
          <required>true</required>
          <version>1.0.0+</version>
          <type>String</type>
          <description>The ID of this lifecycle, for identification in the mojo descriptor.</description>
        </field>
        <field>
          <name>phases</name>