Editing Apache POI (section)

===Office Open XML support===
POI supports the ISO/IEC 29500:2008 [[Office Open XML]] file formats since version 3.5. A significant contribution for OOXML support came from Sourcesense,<ref>{{citation |url=https://www.sourcesense.com/ |title=SourceSense}}</ref> an [[Open-source software|open source]] company which was commissioned by [[Microsoft]] to develop this contribution.<ref>{{cite web
 |last1=McDougall |first1=Paul
 |date=2008-03-26 |df=dmy
 |url=https://www.informationweek.com/microsoft-eyes-open-source-components-for-office-2007/d/d-id/1066089
 |title=Microsoft Eyes Open Source Components for Office 2007
 |work=[[InformationWeek]]
 |access-date=2020-07-21
}}</ref> This link spurred controversy, some POI contributors questioning POI OOXML patent protection regarding Microsoft's [[Open Specification Promise]] patent license.<ref>{{citation |last1=Oliver |first1=Andrew C. |date=2008-03-27 |df=dmy |url=https://mail-archives.apache.org/mod_mbox/poi-dev/200803.mbox/%3C47EAE71C.6040603@buni.org%3E |title=Rejection of any ENCUMBERED Microsoft Donation to POI |work=POI development mailing list archives |access-date=2020-07-21}}</ref>