[ckan-discuss] Search by "Extras" field

Wed Mar 10 09:37:46 GMT 2010

Will,

I would have thought the concept of leaving them as arbitrary fields
goes against the grain of linked data. Configurable mapping gets my
vote.

Values could well be URIs. The more the better I say.

David

On 9 March 2010 21:22, William Waites <ww at styx.org> wrote:
> Also, how should we construct RDF out of the extras?
>
> Searching it would be easy in that case...
>
> Do we make an extras key namespace? Do we make a (configurable)
> mapping onto terms from other vocabularies? Both (via sameAs?)
>
> Are the values always text strings or might they be URIs?
>
> Cheers,
> -w
>
> Le 10-03-09 à 20:15, David Read a écrit :
>
>> The simplest way to do this is with the search API. You can do
>> something like this:
>>
>> http://ckan.net/api/search/package?department=Her+Majesty's+Treasury
>>
>> The docs ( http://knowledgeforge.net/ckan/doc/ckan/api.html ) show
>> that 'department' is in a small hard-coded list of extra fields that
>> are indexed in the search and accessible through the API. So as it is
>> right now, 'ministry' won't work in this way, because we've not needed
>> this flexibility up until now.
>>
>> It might make sense to have this list configurable in the config file.
>> Alternatively we could just index all extra fields and when parsing
>> the search query, if the key isn't one of the known fields or search
>> commands then search the extra fields for it. Perhaps it would be best
>> to allow key prefixed with 'extra-', giving
>> "?extra-ministry=Treasury". Rufus, what do you think?
>>
>> David
>>
>> On 9 March 2010 19:23, Colin Calnan <colin at raisedeyebrow.com> wrote:
>>>
>>> Is there anyway to list Packages by "extras" fields via the API?
>>>
>>> Would it be possible to call
>>> ckan.net/api/rest/package/extrasKey-extrasValue
>>> ?
>>>
>>> We're using extras fields to hold information about government
>>> ministries,
>>> and it would be great if we could list all packages that are assigned a
>>> ministry. Right now to get that data I have to loop through every package
>>> and build the list as I go along.
>>>
>>> Regards,
>>> Colin
>>> --
>>> *Colin Calnan | Front End Developer*
>>> Raised Eyebrow Web Studio
>>> www.raisedeyebrow.com <http://www.raisedeyebrow.com>
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>>
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> --
> William Waites VE2WSW                <ww at styx.org>
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