On 10/11/11 10:34, Kingsley Idehen wrote:
> On 11/9/11 8:50 PM, Robert Siemer wrote:
>> What I actually want to query:
>> -Android devices with a display of at least 800x480
>>
>>
>> Out of obvious reasons I reduced that to:
>> -list all android devices with display information included
>>
>>
>> After a couple of days I came up with this query:
>>
>> SELECT DISTINCT ?subject, ?display {
>> { ?subject<http://purl.org/dc/terms/subject>
>> <http://dbpedia.org/resource/Category:Android_devices> . }
>> UNION { ?subject a<http://dbpedia.org/class/yago/AndroidDevices> . }
>> OPTIONAL { ?subject<http://dbpedia.org/property/display> ?display }
>> }
>>
>>
>> My problem:
>>
>> Where is that “raw” infobox dataset, which promises “complete coverage
>> of all Wikipedia properties” with minimal clean-up? The downloadable
>> infobox_properties file and the http://dbpedia.org/snorql/ sparql
>> endpoint return only crap for the display property like: “4” or empty
>> values! (Try the query yourself!)
>>
>> The live.dbpedia.org/sparql endpoint returns more, but still useless.
>>
>> I’m aware of the missing ontology mappings for the mobile phone infoboxes
>> (http://en.wikipedia.org/wiki/Template:Infobox_mobile_phone), but:
>> Should dbpedia live not import the raw values when there are no mappings?
>> The wikipedia template uses micro-templates like
>> {{convert|2.1|in|mm|abbr=on}}, how does dbpedia handle that?
>>
>> How does IntermediateNodeMapping separate the property string?? By
>> spaces alone? Then how to handle this?
>> | display = [[TFT LCD]], {{convert|3.2|in|mm|abbr=on}} diagonal<br />
>> 320×480 px HVGA<br /> 1.5:1 aspect-ratio wide-screen<br /> 256K colors
>>
>> As far as I understand, CustomMappings are not implemented via
>> media-wiki, is that right? – Would be nice to have some kind of
>> RegexMapping, with:
>> 1) a regular expression retrieves one or more values (named groups)
>> 2) multiple regular expressions can be given
>> 3) values retrieved can be subject to some mathematical/conditional
>> cleanup (e.g. if first_var< second_var then “short_side” = first_var;
>> “orientation” = portrait)
>> 3b) and some more examples: if xyGA = HVGA then “short_side” = 320
>> 3c) and maybe some extra calulations: “dpi” = sqrt(...+...)/...
>>
>>
>> So, how do I get that display info out of dbpedia at all?
>> And how to improve the situation for easy retrieval of both display
>> dimensions?
>>
>>
>> Thanks,
>> Robert
>>
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>
> Robert,
>
> Orthogonal to your quest, since this is via the LOD cloud cache which
> has DBpedia + other datasets:
>
> http://lod.openlinksw.com/fct/facet.vsp?qxml=%3C%3Fxml%20version%3D%221.0%22%20encoding%3D%22UTF-8%22%20%3F%3E%3Cquery%20inference%3D%22%22%20same-as%3D%22%22%20view3%3D%22%22%20s-term%3D%22%22%20c-term%3D%22%22%3E%3Ctext%3EAndroid%3C%2Ftext%3E%3Cclass%20iri%3D%22http%3A%2F%2Fdbpedia.org%2Fclass%2Fyago%2FAndroidDevices%22%20%2F%3E%3Cproperty%20iri%3D%22http%3A%2F%2Fdbpedia.org%2Fproperty%2Fdisplay%22%3E%3Cview%20type%3D%22list%22%20limit%3D%2220%22%20offset%3D%220%22%20%2F%3E%3C%2Fproperty%3E%3C%2Fquery%3E
>
>
> On DBpedia itself you have:
> http://dbpedia.org/fct/facet.vsp?cmd=load&fsq_id=4What is that good for? My problem is that the property values in dbpedia don’t reflect the infobox of Wikipedia. Example: property:display of Galaxy_Nexus should be: HD Super AMOLED PenTile[6] 4.65 in (118 mm) diagonal 720×1280 px at 316 ppi 16:9 aspect-ratio 16M colors 100,000:1 contrast ratio (typical) 10 μs response time But I get a couple of properties, with integer values of 10, 16, 720 and 100000. Same problem with HTC_Flyer. Instead of 7-inch 1024×600 px I get only “7” out of dbpedia. I see myself where the “7” comes form, but I nevertheless need the raw value from dbpedia to be useful to me... Robert ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ Dbpedia-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion
