 |
 |
Dear James, When reading and writing SEGIDs, why bother making it case unsensitive? Most programming/scripting languages read text case sensitive anyway. Assuming people don't type SEGIDs by hand, differences in capitalization may be significant. When you are generating SEGIDs from scratch, stick to the set you proposed (0-9, A-Z). That way it is more likely that other programs support your SEGIDs. Cheers, Robbie ---------------------------------------- > Date: Wed, 3 Feb 2010 16:15:54 -0800 > From: [log in to unmask] > Subject: Re: [ccp4bb] PDB SEGID Case Sensitivity > To: [log in to unmask] > > On Wednesday 03 February 2010 15:59:26 James Stroud wrote: >> Hello All, >> >> In typically comical fashion, the PDB specification 3.2 at http://www.wwpdb.org/documentation/format32/sect9.html >> leaves out columns 67-76 for ATOM and HETATM records. >> >> Since I can only conclude that SEGIDs must be one of those "grey >> areas", I thought I'd make a multiple choice survey and go with the >> quorum opinion. >> >> Please respond with the most correct answer so I know how to proceed: >> >> >> What is the general status of case sensitivity of SEGID in PDB >> file formats? > > "Don't ask; don't tell" > > PDB sanction of SEGID has been an on-again off-again thing. > > In 1999 they said: > ] We propose to discontinue support for this identifier in files > ] that are processed and released into the archive. No format > ] changes are proposed here, we will simply place blanks in any > ] SEGID fields. > > > So far as I know, the PDB/RCSB folks do not even look at these columns. > So it comes down to a question of individual non-PDB programs. > Which program were you wondering about? > > >> 1. Gee, I thought that it was specified to be case sensitive. >> 2. Well, someone once told me that it was specified to be >> case insensitive but I can't remember who that was. >> 3. I thought it was specified to be something too but >> most programs largely ignore specifications in my experience. >> 4. Specifications are for sissies, real crystallographers >> don't depend on them. >> >> >> Thank you in advance for taking the time to participate. >> >> James >> > > > > -- > Ethan A Merritt > Biomolecular Structure Center > University of Washington, Seattle 98195-7742 _________________________________________________________________ New Windows 7: Find the right PC for you. Learn more. http://windows.microsoft.com/shop