<t>
(Text String)
This element specifies the actual text for this text run. This is the text that will be formatted using all specified body, paragraph and run properties. This element must be present within a run of text.
example:
<p:txBody> … <a:p> … <a:r> … <a:t>Sample Text</a:t> … </a:r> … </a:p> … </p:txBody>
The above DrawingML specifies a text body containing a single paragraph, containing a single run which contains the actual text specified with the <<a:t>>
element.
The possible values for this element are defined by the XML Schema string datatype.