Add some specific material about Qt DOSP contract

dosp-survey.ltx

@@ -121,9 +121,25 @@ for licenses.
 % a "traditional" dual license but so far have not found references to a
 % scheduled relicensing practice.
 
-% TrollTech story is complicated...
-% https://tinf2.vub.ac.be/~dvermeir/manual/KDE20Development-html/ch19lev1sec4.html
-% and more
+As part of the controversies surrounding adoption of the Qt library by the
+KDE project, various Qt copyright holders have also agreed to DOSP practices
+as a contractual backstop to ensure that future versions of Qt remain
+usable in free software. A series of contracts between KDE community
+nonprofit entities and Qt copyright holders include commitments to release
+future Qt versions under specific license terms with a ``within a timeframe
+of not more than 12 months" relative to any proprietary
+release.\footnote{See \otsurl{https://kde.org/community/whatiskde/kdefreeqtfoundation/}, which includes the exact language of the licensors' contractual
+commitments;
+a portion of the historical context is described in
+\otsurl{https://tinf2.vub.ac.be/$\sim$dvermeir/manual/KDE20Development-html/ch19lev1sec4.html}.}
+These rights to delay the application of the free software license have not
+% TODO - ever? to what extent?
+usually
+% TODO
+been exercised in practice; Qt versions have generally been promptly
+licensed under the required licenses. The possibility of a delay together
+with a specific timeframe represented a compromise between the Qt developers'
+and KDE developers' views of their respective interests.
 
 \numberedsection{Scheduled Relicensing}\label{scheduled}