How will the versioning scheme, that I recall being talked about some time ago, work. Did it not need to keep a stable reference to a bitstream along with versions
John On Fri, Aug 15, 2008 at 1:40 PM, Richard Rodgers <[EMAIL PROTECTED]> wrote: > On Fri, 2008-08-15 at 10:12 -0700, Mark Diggory wrote: >> > On Aug 15, 2008, at 9:36 AM, John Preston wrote: >> >> Hi. Can anyone say how I can re-use a bitstream sequence number. The >> >> use case is the following. >> >> >> >> I have a item with a number of bitstreams which are my data files. I >> >> also have a text file bitstream which contains the url to the data >> >> file bitstreams. Now, if I update one of these data files by deleting >> >> the old bitstream and adding the new data file bitstream, the name >> >> remains the same but the sequence number for the updated bitstream is >> >> different from the original data file bitstream. I want to be able to >> >> add the updated data file bitstream with the same sequence number as >> >> the original one. >> >> >> >> Is this allowed, or do I have to hack it. >> >> >> >> John >> >> On Aug 15, 2008, at 10:01 AM, Mark H. Wood wrote: >> >> > Allowed or not, this sounds risky. If you are overloading the >> > sequence number with a new meaning, this practice is likely to bite >> > you again and again, since the developing stock code won't recognize >> > your second meaning and will take no pains to preserve it. >> > >> > What is it that you need to accomplish? >> >> Mark is correct about overloading the semantics here. Note, We >> adjusted the behavior behind the dspace 1.5 XMLUI (but not the JSPUI) >> to allow for unsequenced name resolution of the bitstreams. For >> instance: >> >> http://dspace.mit.edu/bitstream/handle/1721.1/39126/ >> womenpolicymakers_census_dta.tab >> http://dspace.mit.edu/bitstream/handle/1721.1/39126/ >> womenpolicymakers_census_dta.tab?sequence=3 >> http://dspace.mit.edu/bitstream/handle/1721.1/39126/3/ >> womenpolicymakers_census_dta.tab >> >> Are now all valid references the bitstream at this location. In the >> case where the sequence number is absent, the first bitstream >> encountered in the Item with that name is returned. >> >> It certainly would have been much easier to key Bitstreams on the >> name rather than a sequence id in the original architecture. I've >> seen requests such as yours numerous times during my history of >> working on DSpace and being able to reference resources by simple >> assignable predictable names rather than internally generated >> sequence ids makes life on the outside of DSpace easier and 3rd party >> tooling more powerful. This is something I hope to take into the 2.0 >> development initiative. > > Easier perhaps, but unfortunately the Bitstream filename need not be > unique, so is a problematic candidate for a durable reference. > > Richard >> >> Cheers, >> Mark >> >> >> >> ------------------------------------------------------------------------- >> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge >> Build the coolest Linux based applications with Moblin SDK & win great prizes >> Grand prize is a trip for two to an Open Source event anywhere in the world >> http://moblin-contest.org/redirect.php?banner_id=100&url=/ >> _______________________________________________ >> DSpace-tech mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/dspace-tech > > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > DSpace-tech mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/dspace-tech > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ DSpace-tech mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/dspace-tech
