On 10 Feb 2017, at 12:15 PM, Herbario SANT sant.herbarium@gmail.com wrote:

Thanks Matthew.

I just want to use the api to maintain a short summary of our datasets usage along time. I could run a script regularly to keep a local file updated (a table with just a couple of columns: download date and number of records downloaded).

But I am facing this problem: the api returns first the LAST download event (the most recent one). So the offset value is not a valid permanent pointer to any download event.

This difficults paging, specially if you want to space your requests every week or so. How would I know the offset value for my next request, so I don't inject duplicated records to my local file?

This would be much easier to circunvent if the api returns download events in reverse order. So, offset=0 would be the first download event (happened years ago), and offset=3348 would always point to the same download event, whenever it happened.

So, the offset to use for each new request should simply be the current total number of records I have already in my local file. No risk of duplicated results.

Would it possible to introduce an "order=reverse" option in the api, so records could be get returned in the opposite order?

Thanks a lot

David

By way of comparison, MediaWiki’s pagination system doesn’t use offsets at all, but returns a “continue” element, which can then be passed back to the API to indicate “continue from this point” — see https://www.mediawiki.org/wiki/API:Query#Continuing_queries for details. That might work better than an offset, which might change if new records in inserted out of sequence.

cheers, Gaurav

On 7 February 2017 at 14:19, Matthew Blissett mblissett@gbif.org wrote:

...

Hi David,

This API method is documented here: http://www.gbif.org/developer/occurrence#download

There are no search or filtering parameters accepted, only the paging parameters 'limit' and 'offset'. The data portal URL uses that API call, but itself is just displaying this information, and paging through it.

We've experimented with showing a chart for query terms on the demo site, we will consider adding a chart for year of download. Is this related to what you're working on? https://demo.gbif.org/dataset/7f2edc10-f762-11e1-a439-00145eb45e9a/metrics

Matt

On 05/02/17 16:06, Herbario SANT wrote:

...

Hello

Where can I find a list of all possible api parameters for this api request?:

/occurrence/download/dataset/{datasetKey}

It looks similar to the data portal "dataset download activitiy" url, which uses an offset parameter for paging download activity using the links at the end of the page.

http://www.gbif.org/dataset/%7BdatasetKey%7D/activity?offset=10

But ... what other filtering options are there when using the api?

I wonder if there is a way to request activity related to a certain date or date range (or to a single year, month). Some examples:

year=2016 yearRange=2014,2016 date=2017-01-31 dateRange=2016-12-01,2016-12-31

Of course, I am meaning the "download date", not the "occurrence date".

Thanks a lot for your help.

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-- David García San León Herbario SANT Universidade de Santiago de Compostela _______________________________________________ API-users mailing list API-users@lists.gbif.org http://lists.gbif.org/mailman/listinfo/api-users