Microsoft Office have already provided a function to enable optional smartfont features for OOXML format files since 2010, but LibreOffice have no entry to make it available when opening these files. Since LibreOffice implemented toggling OpenType feature, there is a way to get the solution for OOXML format.
Steps to Reproduce:
As my proposal, if an OOXML document have some texts defined its font feature via M$ Office, LibreOffice can making them available on screen, use its own syntex to toggle it after opening the file, and let them available on M$ Office.
User Profile Reset: No
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:50.0) Gecko/20100101 Firefox/50.0
Sounds reasonable -> NEW
With this improve we can also improve our compatibility to OOXML format.
Created attachment 134722 [details]
This is a test file produced by MS Office 2010. This file used Paratino Linotype font, many font features except style set included in this file.
Created attachment 134829 [details]
Test file 2
This file including stylistic set related attribute