Another possibility that's much easier to implement that "full schema
evolution" is to only evolve content item schema and the few other kinds
that are important for them, e.g. item collections. Almost all of the
remaining data in the repository is used by the UI, e.g. CPIA, which can
be completely thrown away and replaced with new schema and instances
when it evolves. So the worst thing that happens is your view is lost
when the schema evolves. If we decided to put the burden of schema
evolution on the content item code and not bother with UI schema
evolution, the task becomes pretty easy since most of the necessary
pieces already exist.
John
Lisa Dusseault wrote:
For 0.6 requirements, so far we've figured that it's acceptable for
dogfood users to have to export and import their data manually in
order to upgrade. That might be limited to event data -- export to
ICS file, import ICS file (this already roughly works though without
supporting recurrence). The sharing code also ought to make it
possible to share arbitrary data to the server, then after throwing
away the local repository pull the data from the server again.
Lisa
On May 6, 2005, at 1:05 PM, Jared Rhine wrote:
Does the Chandler roadmap include a release at which repository
migration (between repository versions) will be supported?
(Automatically or via external scripts?)
I have no particular feelings on the matter. Delaying migration
support is good to allow more time to nail the repository format. If
people start to actually use 0.6 dogfood-style, then data migration
will be helpful, maybe even expected despite any documented warnings.
Linux distro packagers will want to know how this is handled in the
0.7 timeframe because they generally code in support for upgrades into
their packages. Migration doesn't have to be easy, pre-1.0, but it
should be possible.
I'd guess it's either a 0.6, 0.6.1, or 0.7 feature.
PS. This all occurred to me because I got a python traceback from
0x5000 to 0x5200 instead of the popup I got from previous upgrades.
-- [EMAIL PROTECTED]
"We suffer primarily not from our vices or our weaknesses, but from our
illusions. We are haunted, not by reality, but by those images we
have put
in place of reality." - Daniel J. Boorstin
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Open Source Applications Foundation "Dev" mailing list
http://lists.osafoundation.org/mailman/listinfo/dev
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Open Source Applications Foundation "Dev" mailing list
http://lists.osafoundation.org/mailman/listinfo/dev
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Open Source Applications Foundation "Dev" mailing list
http://lists.osafoundation.org/mailman/listinfo/dev
