[ckan-dev] Global Resource Identifier: is it possible?

Tue Apr 7 12:49:27 UTC 2015

In CKAN's default dataset schema dataset IDs and resource IDs are generated
with uuid4[1] on creation. As of CKAN 2.3 sysadmins are allowed to set
dataset IDs on creation, but not the resource IDs. A custom dataset schema
would let you set both the resource and dataset IDs if you need to.

[1]: https://docs.python.org/2/library/uuid.html#uuid.uuid4

On Tue, Apr 7, 2015 at 8:40 AM, Adrià Mercader <adria.mercader at okfn.org>
wrote:

> Hi,
>
> If I understood Alessandro correctly, I think he was asking about whether
> CKAN dataset can be safely uniquely identified using their ids. In theory
> the answer is yes, because as Alessio pointed out we use UUIDs for them,
> but in some cases like the ones Steven mentions (CKAN-CKAN harvesting, the
> same id is shared across instances). You could argue that that still is the
> same dataset, just living in two different portals, but if you want to
> distinguish these datasets you might need to use a hash of id + site url or
> something similar.
>
> Hope this helps,
>
> Adrià
>
> On 7 April 2015 at 12:40, Steven De Costa <
> steven.decosta at linkdigital.com.au> wrote:
>
>> Yep, but I was wondering if Alessandro was talking about a DB that
>> potentially had IDs from different CKAN instances. If so the you'd want
>> to also match on the harvest source ID/URL.
>>
>> For example, on data.gov.au and data.sa.gov.au each Solr service picks
>> up results from either of the two. More instances canbe linked into the
>> results without conflict too.
>>
>>
>> On Tuesday, April 7, 2015, Alessio Dragoni <alessio.dragoni at gmail.com>
>> wrote:
>>
>>> aĺ the IDs in CKAN are UUID
>>> On Apr 7, 2015 1:06 PM, "Alessandro Portosa" <alessandro.portosa at eng.it>
>>> wrote:
>>>
>>>> Hello, I have a question on how the resource (or even the dataset) ID
>>>> is generated.
>>>> Context: I have integrated CKAN inside an analysis tool, where
>>>> resources medata can be saved locally.
>>>> The tool should not be tied to a specific CKAN instance, but the user
>>>> can change the target CKAN url (datahub.io, data.gov, and so on). My
>>>> problem is: I would like to globally identify resources and dataset, but
>>>> I'm not sure how the ID is built. Can anyone give me explanation about
>>>> that? It is really important for us, because metadata are saved in our DB
>>>> using CKAN resource ID as primary key and I need to be sure that there will
>>>> be no conflict if using different CKAN instances.
>>>>
>>>> Alessandro.
>>>>
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>>>
>>
>> --
>> *STEVEN DE COSTA *|
>> *EXECUTIVE DIRECTOR*www.linkdigital.com.au
>>
>>
>>
>>
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>
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