/*!

\page xao_format_page Import and export of shapes in XAO format

XAO is a file format which describes a shape with its topology, groups and fields.

To import a shape in the \b XAO format, in the <b>Main Menu</b> select <b>New Entity ->
Import / Export -> Import XAO. </b> 

To export a shape in the \b XAO format, in the <b>Main Menu</b> select <b>New Entity ->
Import / Export -> Export XAO. </b>

\image html exportxao_dlg.png 

In this dialog:
- Click the arrow button and select in the Object Browser or in the Viewer the <b>Shape</b> to be exported.
- Input the <b>File name</b> to create a new file or click browse button to save in an existing file.
- Select the \b Groups of the chosen shape to be exported.
- Select the \b Fields of the chosen shape to be exported.
- Press "Apply" or "Apply & Close" button to get the result.

It also possible to export a shape using the TUI Command: <em>geompy.MakeExportXAO(Shape, FileName, Groups, Fields)</em>

*/