On Tue, Nov 17, 2015 at 1:02 PM, Chris Bannister <cbannis...@slingshot.co.nz> wrote: > On Tue, Nov 17, 2015 at 09:31:53AM -0500, shawn wilson wrote: >> On Nov 16, 2015 5:37 PM, "Lisi Reisz" <lisi.re...@gmail.com> wrote: >> > department has been trying for an hour". Puzzled, because I thought I had >> > sent a .pdf, and had checked that it opened fine in Evince, I looked at >> the >> > file - groaned - and renamed scan-foo to scan-foo.pdf. When resent it >> >> communicated (via its extension). If you create a pdf, it is bad to not >> have the pdf extension - you've lost data. > > How have you lost data? >
You loose what the file type (data) should be if you save a file w/o an extension. Again, this is fine for an installed program (no one cares as long as it works) but not so good for data that is processed by another program or a script I want to edit.