SII Operation Description is not working as expected in the Spanish version.

Even although the user left blank the Operation Description, we get:

• Sales Invoice: Draft Invoice No. 
• Purchase Invoice: Draft Invoice No.

Some suggestions to fix and improve this behavior:

1. Leave it blank if the user do not fill it
2. Posted Invoice No. + Customer/Vendor Name (for both the same)
3. Description of the invoice line... (if more than one, concatenate)
4. Description of the G/L Account used (if more than one, concatenate)

The preference is to use 1 or 2.

If possible to leave it blank, better. Otherwise option 2 sounds good, too, and better than draft no.