@handrews' proposal, slightly adjusted

Author: ralfhandl

versions/3.0.4.md

@@ -488,7 +488,7 @@ An object representing a Server Variable for server URL template substitution.
 | Field Name | Type | Description |
 | ---- | :----: | ---- |
 | <a name="server-variable-enum"></a>enum | [`string`] | An enumeration of string values to be used if the substitution options are from a limited set. The array SHOULD NOT be empty. |
-| <a name="server-variable-default"></a>default | `string` | **REQUIRED**. The default value to use for substitution, which SHALL be sent if an alternate value is _not_ supplied. If the [`enum`](#server-variable-enum) is defined, the value SHOULD exist in the enum's values. |
+| <a name="server-variable-default"></a>default | `string` | **REQUIRED**. The default value to use for substitution, which SHALL be sent if an alternate value is _not_ supplied. If the [`enum`](#server-variable-enum) is defined, the value SHOULD exist in the enum's values. Note that this behavior is different from the [Schema Object](#schema-object)'s `default` keyword, which documents the receiver's behavior rather than inserting the value into the data. |
 | <a name="server-variable-description"></a>description | `string` | An optional description for the server variable. [CommonMark syntax](https://spec.commonmark.org/) MAY be used for rich text representation. |
 
 This object MAY be extended with [Specification Extensions](#specification-extensions).