Thanks for the answer. However, the current behavior is not fully satisfactory.
In MS-Word, when pasting an image from an svg editor, such as Inkscape, Word offers :
Paste as Image( PNG )
Paste as Image(SVG)
Paste as Image(SVG Inkscape)
Using the method "Copy to System clipboard" in yEd, MS-Word offers:
Device Independent Bitmap
Picture (Enhanced Metafile)
Moreover, when pasting as enhanced metafile, the image aspect ratio is different than the image displayed by yEd.
I would like the system clipboard to contain an image recognized as SVG by MS-Word and other common software.