I thought about it. I named the boolean force? and would likely use the keyword #::force, since longer, more descriptive ones seem somewhat annoying. That would give (make-uuid-3 namespace-DNS "<a href="http://www.widgets.com/" target="_blank">www.widgets.com</a>" #:force #t). How does that look?<br> <br><div class="gmail_quote">On Wed, Dec 16, 2009 at 8:31 AM, Sam TH <span dir="ltr"><<a href="mailto:samth@ccs.neu.edu">samth@ccs.neu.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> On Wed, Dec 16, 2009 at 10:24 AM, Doug Williams<br> <div class="im"><<a href="mailto:m.douglas.williams@gmail.com">m.douglas.williams@gmail.com</a>> wrote:<br> ><br> </div><div class="im">> ...<br> > (make-uuid-3 namespace-DNS "<a href="http://www.widgets.com" target="_blank">www.widgets.com</a>") = #<uuid<br> > 3d813cbb-47fb-32ba-91df-831e1593ac29><br> > (make-uuid-3 namespace-DNS "<a href="http://www.widgets.com" target="_blank">www.widgets.com</a>" #t) = #<uuid<br> > e902893a-9d22-3c7e-a7b8-d6e313b71d9f><br> > ...<br> <br> </div>I think it would be helpful to use an optional keyword argument here,<br> rather than just an optional boolean.<br> <font color="#888888"><br> --<br> sam th<br> <a href="mailto:samth@ccs.neu.edu">samth@ccs.neu.edu</a><br> </font></blockquote></div><br>