There's also the database varchar restrictions. Particularly with the legacy llstore implementation, the "token" field in the datastreamPaths table is currently limited to around 200 characters. That holds the pid, a delmiter, the datastream id, another delimiter, then the datastream version id. Altogether it's 64 + 1 + 64 + 1 + 64 max characters for that field currently.
I'm not opposed to increasing the max length in future versions, but I agree it's not a trivial change. Going beyond 255 chars in a varchar field may mean changing the field type in order to get past the 255 length with some databases (like older versions of MySQL). Would there be a significant performance impact? Hard to tell. - Chris On Thu, Mar 31, 2011 at 7:12 AM, Steve Bayliss <stephen.bayl...@acuityunlimited.net> wrote: > Hi Ben > > The simple answer is that changing this in the XSD won't be sufficient - > there's a PID class that does some java checking also (possibly elsewhere in > the code there are checks also). > > As a general point it wouldn't I think make sense to allow any arbitrary > string as a Fedora PID - however if there would be real value in increasing > the current limit maybe that is something that should be looked at. > > What sort of maximum length would you like to see? > > I would guess that increasing the length could have some performance > implications - I'm thinking of the SQL database indexing; maybe people have > some thoughts on this. > > Regards > Steve > >> -----Original Message----- >> From: Benjamin Ryan [mailto:b.r...@leeds.ac.uk] >> Sent: 30 March 2011 13:21 >> To: fedora-commons-users@lists.sourceforge.net >> Subject: [fcrepo-user] Length of OBJID attribute >> >> >> Hi, >> I have hit a snag with the OBJID attribute. >> The docs say that the maximum length is 64 (I know this is >> defined in the XSD) but I use GUIDs plus other strings to >> construct PIDs and so have exceeded the max length. >> Can I just change this in the XSD or will this break >> something else (I am not too worried about portabibilty at >> the moment)? >> If this cannot be changed just in the XSD would it possible >> to request a config option for this in a later release? >> >> Regards, >> Ben >> --------------------------------------------------------------------- >> Dr Ben Ryan >> Timescapes Archive Technical Officer >> School of Sociology and Social Policy >> Faculty of Education, Social Sciences and Law >> Social Science Building >> The University of Leeds >> Leeds LS2 9JT >> Email: b.r...@leeds.ac.uk<mailto:b.r...@leeds.ac.uk> >> Tel: 0113 343 7319 >> Website: >> http://www.timescapes.leeds.ac.uk<http://www.timescapes.leeds.ac.uk/> >> --------------------------------------------------------------------- >> >> -------------------------------------------------------------- >> ---------------- >> Enable your software for Intel(R) Active Management >> Technology to meet the >> growing manageability and security demands of your customers. >> Businesses >> are taking advantage of Intel(R) vPro (TM) technology - will >> your software >> be a part of the solution? Download the Intel(R) >> Manageability Checker >> today! http://p.sf.net/sfu/intel-dev2devmar >> _______________________________________________ >> Fedora-commons-users mailing list >> Fedora-commons-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/fedora-commons-users >> > > > ------------------------------------------------------------------------------ > Create and publish websites with WebMatrix > Use the most popular FREE web apps or write code yourself; > WebMatrix provides all the features you need to develop and > publish your website. http://p.sf.net/sfu/ms-webmatrix-sf > _______________________________________________ > Fedora-commons-users mailing list > Fedora-commons-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/fedora-commons-users > ------------------------------------------------------------------------------ Create and publish websites with WebMatrix Use the most popular FREE web apps or write code yourself; WebMatrix provides all the features you need to develop and publish your website. http://p.sf.net/sfu/ms-webmatrix-sf _______________________________________________ Fedora-commons-users mailing list Fedora-commons-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/fedora-commons-users
