Hi Ben,

"Note that the item-less form of this query also works for string,
time, and coordinate properties." means that if you ask it simply for
CLAIM[486], with no colon, you'll get all items which have any kind of
value for the 486 property, regardless of whether it's a string, a
coordinate, etc.

I *think* the reason you're getting some results for
CLAIM[486:"string"] is because the system is somehow matching these up
with the items that have null/unknown values for 486 and returning
those.

Andrew.

On 27 October 2014 03:52, Benjamin Good <ben.mcgee.good@gmail.com> wrote:
> Yep, my bad..  the correct query with the string syntax returns the results
> as expected.
> STRING[486:"D008180"]
>
> But I'm still confused why the query
> CLAIM[486:"D008180"]
>
> gives the results that it does?  None of the returned items has the string
> target of that property as "D008180".
>
> It seems like its an erroneous query from the documentation that you pointed
> me to.  The only thing that mentions the use of strings in CLAIM queries is
> rather vague: "Note that the item-less form of this query also works for
> string, time, and coordinate properties."  What does that mean?
>
> The following queries return the same results:
> CLAIM[486:"D008180"]
> CLAIM[486:"D008181"]
> CLAIM[486:"D"]
> CLAIM[486:" "]
>
> though this is different (returns nothing):
> CLAIM[486:""]
>
> Is there ever a reason that a string should be used within a claim query?
> If not, shouldn't the API throw an error?
>
> thanks
> -Ben
>
>
>
>
>
>
>
> On Sun, Oct 26, 2014 at 3:50 PM, Magnus Manske <magnusmanske@googlemail.com>
> wrote:
>>
>> Indeed. Full API documentation:
>> http://wdq.wmflabs.org/api_documentation.html
>>
>> On Sun, Oct 26, 2014 at 4:52 PM, Andrew Gray <andrew.gray@dunelm.org.uk>
>> wrote:
>>>
>>> CLAIM seems to expect that the target is an item number, rather than a
>>> text string. For string properties, I think the correct query is:
>>>
>>> STRING[486:"D008180"]
>>>
>>>
>>> http://tools.wmflabs.org/autolist/index.php?language=en&project=wikipedia&category=&depth=12&wdq=STRING[486%3A%22D008180%22]&mode=undefined&statementlist=&run=Run&label_contains=&label_contains_not=&chunk_size=10000
>>>
>>> Andrew.
>>>
>>> On 24 October 2014 18:13, Benjamin Good <ben.mcgee.good@gmail.com> wrote:
>>> > Using the autolist 2 tool
>>> > (http://tools.wmflabs.org/autolist/index.php), I
>>> > enter the WDQ query:
>>> > CLAIM[486:"D008180"]
>>> >
>>> > which I think means "Give me the items that have MeSH id = "D008180" ".
>>> > It
>>> > does indeed return an item with that claim Q1495661
>>> >
>>> > but also returns items that have an no value as the object of that
>>> > relationship, such as
>>> > http://www.wikidata.org/wiki/Q3377653
>>> > http://www.wikidata.org/wiki/Q7796109
>>> > http://www.wikidata.org/wiki/Q1598365
>>> >
>>> > Is this a bug in the query API or a bug in my query ?
>>>
>>>
>>>
>>> --
>>> - Andrew Gray
>>>   andrew.gray@dunelm.org.uk
>>>
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>>
>>
>>
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--
- Andrew Gray
  andrew.gray@dunelm.org.uk

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