Draft Stage 3 Proposal for 13061

Greetings colleagues

I have completed the first cut of the second Stage 3 Proposal document, for
Proposal 13061 (the ua-window element), and have attached it here in DITA
and HTML forms.

Would you please read through this document and see if I have correctly
translated the proposal from its earlier incarnation as a Stage 2 proposal
(https://www.oasis-open.org/apps/org/workgroup/dita/download.php/50134/dita-
proposal-uawindow_13061.html)?  I am concerned about whether I have got the
DTD and specification sections correct, so can you please pay particular
attention to those? 

Thanks!

Tony Self
Chair, OASIS DITA Help Subcommittee