Oh Thomas, why do you do it to us? May I ask what the specific application is? Depending on what you need, an insertion can be modelled with a feature covering both bases with a specific glyph (or type).
I think what you propose is a common approach, but it is very likely going to break things for some clients (or at least give undefined results). Some additional element would be more compatible. On 7 Mar 2011, at 14:41, Thomas Down wrote: > The day has come when I find I need to be able to distinguish between a > feature which actually *covers* one or a small number of bases (e.g. a SNP) > and a feature which refers to a point between two bases (e.g. an > insertion). Have any other DAS folk dealt with this before, and if so how? > One possible approach would be something like: > > <START>30000000</START> > <STOP>29999999</STOP> > > ...as a way to reference the position between the 29999999th and 30000000th > bases in a sequence... but is this going to break lots of existing client > code? > > (I also rather dislike it because there's currently sanity-checking code in > Dazzle to stop you doing stuff like this...) > > Any better ideas? > > Thomas. > > PS. Yes, I'm aware this is a solved problem in DAS/2. Afraid I need a DAS/1 > solution, though. > _______________________________________________ > DAS mailing list > [email protected] > http://lists.open-bio.org/mailman/listinfo/das _______________________________________________ DAS mailing list [email protected] http://lists.open-bio.org/mailman/listinfo/das
