XmlFileNamespaces Property MSBuild Extension Pack Help 4.0.12.0
TaskItems specifiying "Prefix" and "Uri" attributes for use with the specified XPath

Namespace: MSBuild.ExtensionPack.Xml
Assembly: MSBuild.ExtensionPack (in MSBuild.ExtensionPack.dll) Version: 4.0.0.0
See Also

Reference