And the set of XXXX before the CoPr are not random values either, and you will need to ensure that they don't conflict with the GUID specifications either.
Blair -----Original Message----- From: Blair [mailto:os...@live.com] Sent: Monday, May 09, 2011 10:11 PM To: 'General discussion for Windows Installer XML toolset.' Subject: Re: [WiX-users] [Wix-users] Each byte in a GUID is NOT UNIQUE: there are guid versions, etc. of which Office and the COM infrastructure make use of certain types of GUID that most applications don't use to help avoid collisions. Unless you are following the spec of how to build a GUID, I wouldn't manufacture them that way. In fact, your CoPr value would have to be constrained to ensure that you don't create reserved or otherwise defined elsewhere GUID types. Blair -----Original Message----- From: Aaron Klor [mailto:aaron.k...@gmail.com] Sent: Monday, May 09, 2011 7:06 AM To: General discussion for Windows Installer XML toolset. Subject: [WiX-users] [Wix-users] We are considering defining our product codes for our different instances with a bit more structure than the random GUID generation that is usually recommended. We are considering this because we have to define a large number of product code GUIDs for each product AND change them every time we do a build. There is precedent for this sort of behavior (set by the Micrsoft Office team, see HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\90140000-XXXX-XXXX- 0000000FF1CE), so we've decided to ask the list in order to hopefully gain some insight as to whether this is considered "bad form" or if this might be acceptable. For reference, we were considering something of this form: {XXXXXXXX-XXXX-XXXX-CoPr-MaMiRvBildIn} Where the X's are randomly generated GUID bits, but will be the same throughout our products The description of the rest of the fields are: Co: 8-bit company code (human-readable, using A-F) Pr: 8-bit product code (human-readable, using A-F) Ma: Major rev Mi: Minor rev Rv: Revision Bild: Build number In: Instance number We understand that this significantly reduces the randomness of the GUID (potentially removing the GU part of GUID), but given the manageability gains, we feel that it might be worth it. It gives us the ability to easily generate (and programmatically search for) up to 255 instances, allows for revisions up to 255.255.255.65535, and can potentially simplify our WiX authoring. Obviously, this will cause problems in the case a GUID collision occurs between our product and someone else's, but we find this highly unlikely given that there are still 64 random bits in the GUID. I suppose the real question is: is there something that we're missing? Might this sort of thing affect things outside the ARP on Windows machines? Thank you for your help, Aaron Klor ---------------------------------------------------------------------------- -- WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. Delivers lowest initial acquisition cost and overall TCO of any competing solution. http://p.sf.net/sfu/whatsupgold-sd _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users ---------------------------------------------------------------------------- -- Achieve unprecedented app performance and reliability What every C/C++ and Fortran developer should know. Learn how Intel has extended the reach of its next-generation tools to help boost performance applications - inlcuding clusters. http://p.sf.net/sfu/intel-dev2devmay _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users ------------------------------------------------------------------------------ Achieve unprecedented app performance and reliability What every C/C++ and Fortran developer should know. Learn how Intel has extended the reach of its next-generation tools to help boost performance applications - inlcuding clusters. http://p.sf.net/sfu/intel-dev2devmay _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users
