ImageGear .NET
Alternate Content
| User Guide > How to Work with... > Formats with Additional Functionality > Office > Word Documents > Supported WordprocessingML Groups > Alternate Content |
Office Open XML defines a mechanism for the storage of content which is not defined by ECMA-376, for example, extensions developed by future software applications which leverage the Office Open XML formats. This mechanism allows for the storage of a series of alternative representations of content, of which the consuming application should use the first alternative whose requirements are met.
Alternate Content has two XML sub-trees: Choice and Fallback. Choice tree usually has some custom, not defined by ECMA-376 content, while Fallback tree contains standard WordprocessingML elements. So, ImageGear considers Fallback sub-tree only.