{"id":2081,"date":"2005-11-30T13:43:04","date_gmt":"2005-11-30T13:43:04","guid":{"rendered":"http:\/\/www.leobard.net\/blog\/?p=2081"},"modified":"2017-11-04T15:48:16","modified_gmt":"2017-11-04T15:48:16","slug":"sparqling-the-opera-community","status":"publish","type":"post","link":"https:\/\/www.leobard.net\/blog\/2005\/11\/30\/sparqling-the-opera-community\/","title":{"rendered":"sparqling the opera community"},"content":{"rendered":"

as suggested on the swig scratchpad<\/a>, we should search for examples.<\/p>\n

ok, what we have is a SPARQL <\/a>conformant query interface to 2mio triples<\/a> that come from a community website (users, forums, photos, etc)<\/a><\/p>\n

I did a little blind shots, not very amusing. By mistake, I did a full table scan on all instances once (* type *) and got a 100mb file with uris to play with. None of the uris has a DESCRIBE (argh, why isn’t CBD in SPARQL yet<\/a>).<\/p>\n

so, this for example doesn’t work:
\n
\nPREFIX rdfs: <http:\/\/www.w3.org\/2000\/01\/rdf-schema#>
\nPREFIX rdf: <http:\/\/www.w3.org\/1999\/02\/22-rdf-syntax-ns#>
\nDESCRIBE <http:\/\/my.opera.com\/butchevans\/homes\/albums\/10149\/PA140033.JPG>
\n<\/cite><\/p>\n

typical uris and types I found:
\nhttp:\/\/my.opera.com\/_1\/xml\/foaf#_1
\nhttp:\/\/my.opera.com\/Fietsy\/xml\/foaf#Fietsy<\/a>
\n– these are of type foaf:Person<\/p>\n

http:\/\/my.opera.com\/masterpdc\/homes\/albums\/2158\/IMG_1557.JPG<\/a>
\nhttp:\/\/my.opera.com\/jessegoodwin\/homes\/albums\/2156\/DSCN0322.JPG<\/a>
\n– these are of type foaf:Image<\/p>\n

http:\/\/my.opera.com\/shawncl\/albums\/show.dml?id=11201<\/a>
\nthis has got type gallery:
\nhttp:\/\/my.opera.com\/community\/xmlns\/2005\/gallery#Gallery<\/a><\/p>\n

these are blogs:
\nhttp:\/\/my.opera.com\/matthewserg\/blog\/<\/a>
\ntype: http:\/\/purl.org\/dc\/elements\/1.1\/Collection<\/a><\/p>\n

a document:
\nhttp:\/\/my.opera.com\/olli\/blog\/show.dml\/2235<\/a>
\ntype: http:\/\/xmlns.com\/foaf\/0.1\/Document<\/a><\/p>\n

groups:
\nhttp:\/\/my.opera.com\/groops\/xml\/foaf#groops<\/a>
\nhttp:\/\/my.opera.com\/iran%20sayeha\/xml\/foaf#iran_sayeha<\/a>
\ntype: http:\/\/xmlns.com\/foaf\/0.1\/Group<\/a>
\n<\/cite><\/p>\n

ok, looking at the opera community site we see that there is a guy named Words <\/i> who is member of the week, meaning he is very active. So sparqling for Words looks like this:<\/p>\n

PREFIX rdfs:
\n<http:\/\/www.w3.org\/2000\/01\/rdf-schema#>
\nPREFIX rdf:
\n<http:\/\/www.w3.org\/1999\/02\/22-rdf-syntax-ns#>
\nSELECT ?p ?o WHERE
\n{<http:\/\/my.opera.com\/Words\/xml\/foaf#Words> ?p ?o.}<\/cite><\/p>\n

Well, this brought us his foaf:knows relations and his weblog uri. cool. Lets make a backlink search:<\/p>\n

\nPREFIX rdfs:
\n<http:\/\/www.w3.org\/2000\/01\/rdf-schema#>
\nPREFIX rdf:
\n<http:\/\/www.w3.org\/1999\/02\/22-rdf-syntax-ns#>
\nSELECT ?s ?p WHERE { ?s ?p
\n<http:\/\/my.opera.com\/Words\/xml\/foaf#Words>.}<\/cite><\/p>\n

this brought some pictures he created, connected via dc:creator uri: http:\/\/purl.org\/dc\/elements\/1.1\/creator<\/a>.<\/p>\n

and much more….<\/p>\n

ok, thsi should be enough to get people on the track to build guis and web 2.0 stuff on top of opera community.<\/p>\n

thanks to opera: the users data is users data now, not theirs. cool move.<\/p>\n","protected":false},"excerpt":{"rendered":"

as suggested on the swig scratchpad, we should search for examples. ok, what we have is a SPARQL conformant query interface to 2mio triples that come from a community website (users, forums, photos, etc) I did a little blind shots, not very amusing. By mistake, I did a full table scan on all instances once … <\/p>\n

Continue reading “sparqling the opera community”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bluesky_dont_syndicate":"","_bluesky_syndication_accounts":"","_bluesky_syndication_text":"","activitypub_content_warning":"","activitypub_content_visibility":"","activitypub_max_image_attachments":3,"activitypub_interaction_policy_quote":"anyone","activitypub_status":"","footnotes":""},"categories":[5],"tags":[],"class_list":["post-2081","post","type-post","status-publish","format-standard","hentry","category-semweb"],"yoast_head":"\nsparqling the opera community - Leobard's blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.leobard.net\/blog\/2005\/11\/30\/sparqling-the-opera-community\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"sparqling the opera community - Leobard's blog\" \/>\n<meta property=\"og:description\" content=\"as suggested on the swig scratchpad, we should search for examples. ok, what we have is a SPARQL conformant query interface to 2mio triples that come from a community website (users, forums, photos, etc) I did a little blind shots, not very amusing. 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