[ckan-discuss] "Permanence" of the data: how can CKAN help me ?

Mark Wainwright mark.wainwright at okfn.org
Tue Jan 22 13:38:57 GMT 2013

Sean's answers assume, of course, that the metadata has changed as
well as the data. If CKAN has a resource which links to a data file
somewhere else, and the data file changes, it will never know.
However, if you're aiming for data permanence as quoted, presumably
this would never happen: rather a new file of data would be released.
A natural way to handle this in CKAN would be to add an extra resource
to the dataset for each new release of data (e.g. each year's data),
which will show up as an update for anyone who is 'following' the

The dataset description and resource descriptions can be used to give
details of the structure of the data and indicate if it's changed.


On 22/01/2013, Sean Hammond <sean.hammond at okfn.org> wrote:
>> Let say you have a data provider that update its data every month:
>> - what is the best way in CKAN to keep track of the old versions of the
>> data ?
>> - how can I define in CKAN different versions of the same dataset ?
> CKAN keeps track of dataset "revisions", you click on the "History" tab
> on a dataset's page to see it, here's an example (CKAN 1.8):
> http://datahub.io/dataset/history/1855spanishrailways
> In CKAN 2.0 datasets (and groups) have an "activity stream" tab instead
> of the history tab, examples:
> http://publicdata.eu/dataset/activity/-municipal-waste-generation-in-england-from-2000-01-to-2009-10
> http://publicdata.eu/group/activity/agriculture
>> - how can I inform the consumer that there is a new version of the
>> data, that the data structure or interface has changed ? Does CKAN
>> provide here some standard processes ?
> Logged-in users can click on the "follow" button on a dataset's page to
> follow that dataset. In CKAN 2.0 you can also follow groups. Then when
> you login to CKAN, you get an "activity stream" on your dashboard
> showing activities from everything you're following. In CKAN 2.0, users
> can also turn on email notifications and get an email when they have new
> activities on their dashboard.
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