An annotation element can contain one or more System.Xml.Schema.XmlSchemaAppInfo instances (information for applications) and System.Xml.Schema.XmlSchemaDocumentation instances (comments or text for humans).

An annotation is used to store extra information about the schema or its elements. These notes are specified for human consumption, xs:documentation, or by software, xs:appinfo. Annotation can be the first element of most schema elements or anywhere under the schema element.

Namespace: System.Xml.Schema
Assembly: System.Xml (in System.Xml.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0, 4.0.0.0