Extension Class

Office 2010

Extension.When the object is serialized out as xml, its qualified name is p:ext.

Namespace:  DocumentFormat.OpenXml.Presentation
Assembly:  DocumentFormat.OpenXml (in DocumentFormat.OpenXml.dll)

public class Extension : OpenXmlCompositeElement

The following table lists the possible child types:

[ISO/IEC 29500-1 1st Edition] ext (Extension)

This element specifies an extension that is used for future extensions to the current version of DrawingML. This allows for the specifying of currently unknown elements for later versions of generating applications.

[Note: This element is not intended to reintroduce transitional schema into the strict conformance class. end note]

Parent Elements

extLst (§; extLst (§

Child Elements


Any element in any namespace




uri (Uniform Resource Identifier)

This attribute specifies the URI, or uniform resource identifier that represents the data stored under this tag. The URI is used to identify the correct 'server' that can process the contents of this tag.

The possible values for this attribute are defined by the W3C XML Schema token datatype.

[Note: The W3C XML Schema definition of this element’s content model (CT_Extension) is located in §A.3. end note]

© ISO/IEC29500: 2008.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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