DocumentID: ECMA-376/Part3/2.18.1 Title: ECMA-376, Part3: 2.18.1 Text Boxes Extracted-From: ECMA-376 Office Open XML File Formats, 1st Edition / December 2006 Warning: Coverted to HTML format by a script known to have bugs
All VML-based drawing objects (except for connectors) support the addition of rich WordprocessingML content within their extents. When WordprocessingML contents have been added to a VML drawing object, the resulting text is contained within a text box.
When WordprocessingML content is contained within a text box, it is represented within the object by specifying the VML textbox element, which contains within it a single txbxContent element that contains all of the desired WordprocessingML content. Text box content cannot contain references to other document stories, nor can it contain other txbxContent elements. That is, nested shapes cannot have rich content.