LinkSUM

Awesome!

Overview

How to use the sum service:

query parameter entity*: the URI of the DBpedia resource
query parameter topK*: the number of triples the summary should contain
query parameter maxHops the maximum number of hops in the graph the result should contain.
query parameter language defines the language of the output literals. We recommend to use RFC 4646.
query parameter fixedProperty: the URI of a DBpedia predicate. If this parameter is present, the
system focuses on statements that involve the given entity in combination with the given predicate.

The parameters marked with the star symbol (*) are mandatory.

Example queries:

HTML

sum?entity=http://dbpedia.org/resource/Douglas_Adams&topK=10
sum?entity=http://dbpedia.org/resource/Original_Sin_(2001_film)&topK=10
sum?entity=http://dbpedia.org/resource/Usain_Bolt&topK=10
sum?entity=http://dbpedia.org/resource/Marie_Curie&topK=10
sum?entity=http://dbpedia.org/resource/Manchester_City_F.C.&topK=10
sum?entity=http://dbpedia.org/resource/Lexus&topK=10
sum?entity=http://dbpedia.org/resource/The_Cosby_Show&topK=10

JSON-LD, Turtle, RDF+XML, etc. (to copy&paste for console)

curl -i -d "[ a <http://purl.org/voc/summa/Summary> ; \
<http://purl.org/voc/summa/entity> \
<http://dbpedia.org/resource/Porsche> ; \
<http://purl.org/voc/summa/topK> '5'; \
<http://purl.org/voc/summa/maxHops> '1'; \
<http://purl.org/voc/summa/language> 'en'; \
<http://purl.org/voc/summa/fixedProperty> \
<http://dbpedia.org/ontology/keyPerson>; \
<http://purl.org/voc/summa/fixedProperty> \
<http://dbpedia.org/ontology/owner>  ] ." \
-H "content-type: text/turtle" -H "accept: application/ld+json" http://km.aifb.kit.edu/services/link/sum

Main publication

Andreas Thalhammer, Nelia Lasierra, and Achim Rettinger: LinkSUM: Using Link Analysis to Summarize Entity Data.
Web Engineering, 16th International Conference, ICWE 2016, Lugano, Switzerland, June 6-9, 2016. Proceedings, Lecture Notes in Computer Science 2016, pages 244-261 http://dx.doi.org/10.1007/978-3-319-38791-8_14

Please cite LinkSUM in your publication as follows:

@InCollection{linksum,
  Title                    = {{LinkSUM: Using Link Analysis to Summarize Entity Data}},
  Author                   = {Thalhammer, Andreas and Lasierra, Nelia and Rettinger, Achim},
  Booktitle                = {Web Engineering: 16th International Conference, ICWE 2016, Lugano, Switzerland, June 6-9, 2016. Proceedings},
  Publisher                = {Springer International Publishing},
  Year                     = {2016},

  Address                  = {Cham},
  Pages                    = {244--261},
  Series                   = {Lecture Notes in Computer Science},
  Volume                   = {9671},

  Doi                      = {10.1007/978-3-319-38791-8_14},
  ISBN                     = {978-3-319-38791-8},
  Url                      = {http://dx.doi.org/10.1007/978-3-319-38791-8_14}
}

Related publications

Andreas Thalhammer and Achim Rettinger: PageRank on Wikipedia: Towards General Importance Scores for Entities.
The Semantic Web: ESWC 2016 Satellite Events, Heraklion, Crete, Greece, May 29 - June 2, 2016, Revised Selected Papers, Lecture Notes in Computer Science 2016, pages 227-240 http://dx.doi.org/10.1007/978-3-319-47602-5_41
Andreas Thalhammer and Achim Rettinger: ELES: Combining Entity Linking and Entity Summarization.
Web Engineering, 16th International Conference, ICWE 2016, Lugano, Switzerland, June 6-9, 2016. Proceedings, Lecture Notes in Computer Science 2016, pages 547-550 http://dx.doi.org/10.1007/978-3-319-38791-8_45
Andreas Thalhammer and Steffen Stadtmüller: SUMMA: A Common API for Linked Data Entity Summaries.
Engineering the Web in the Big Data Era, Lecture Notes in Computer Science 2015, pages 430-446 http://dx.doi.org/10.1007/978-3-319-19890-3_28
Andreas Thalhammer and Achim Rettinger: Browsing DBpedia Entities with Summaries.
The Semantic Web: ESWC 2014 Satellite Events, Lecture Notes in Computer Science 2014, pages 511-515 http://dx.doi.org/10.1007/978-3-319-11955-7_76
Antonio Roa-Valverde, Andreas Thalhammer, Ioan Toma, and Miguel-Angel Sicilia: Towards a formal model for sharing and reusing ranking computations.
In Proceedings of the 6th International Workshop on Ranking in Databases In conjunction with VLDB 2012.

Configuration:

Important: the Wikipedia API calls (see below) have a limit of 500 results. In case of large entities with many in and outlinks, for performance reasons, we do not retrieve all backlinks. This can lead to wrong information (i.e., the set of backlinks can be incorrect). Therefore, as of January 2017, this service is no longer ready to be used for scientific experiments.

The configuration of this LinkSUM instance uses the following setup:

It is directly hooked to the official DBpedia SPARQL endpoint. The main SPARQL query is as follows:

PREFIX vrank:<http://purl.org/voc/vrank#>
PREFIX rdfs:<http://www.w3.org/2000/01/rdf-schema#>
PREFIX dbp-ont:<http://dbpedia.org/ontology/>
PREFIX dbp-prop:<http://dbpedia.org/property/>

SELECT ?s ?p ?o ?slabel ?plabel ?olabel ?v 
FROM <http://dbpedia.org> 
FROM <http://people.aifb.kit.edu/ath/#DBpedia_PageRank> 
WHERE {
	{	<http://dbpedia.org/resource/Douglas_Adams> ?p ?o.
		FILTER regex(str(?o),"http://dbpedia.org/resource","i").
		FILTER (?p != dbp-ont:wikiPageWikiLink && ?p != <http://purl.org/dc/terms/subject> && ?p != dbp-prop:wikiPageUsesTemplate && ?p != rdfs:seeAlso && ?p != <http://www.w3.org/2002/07/owl#differentFrom>).
		OPTIONAL {?o rdfs:label ?olabel. FILTER langmatches( lang(?olabel), "EN" ). }.
		OPTIONAL {?p rdfs:label ?plabel. FILTER langmatches( lang(?plabel), "EN" ).}.
		OPTIONAL {<http://dbpedia.org/resource/Douglas_Adams> rdfs:label ?slabel. FILTER langmatches( lang(?slabel), "EN" ).}.
		OPTIONAL {?o vrank:hasRank ?r. ?r vrank:rankValue ?v}.
	} 
UNION
	{	?s ?p <http://dbpedia.org/resource/Douglas_Adams>.
		FILTER regex(str(?s),"http://dbpedia.org/resource","i").
		FILTER (?p != dbp-ont:wikiPageWikiLink && ?p != <http://purl.org/dc/terms/subject> && ?p != dbp-prop:wikiPageUsesTemplate && ?p != rdfs:seeAlso && ?p != <http://www.w3.org/2002/07/owl#differentFrom>).
		OPTIONAL {?s rdfs:label ?slabel.   FILTER langmatches( lang(?slabel), "EN" ). }.
		OPTIONAL {?p rdfs:label ?plabel.  FILTER langmatches( lang(?plabel), "EN" ).}.
		OPTIONAL {<http://dbpedia.org/resource/Douglas_Adams> rdfs:label ?olabel. FILTER langmatches( lang(?olabel), "EN" ).}.
		OPTIONAL {?s vrank:hasRank ?r. ?r vrank:rankValue ?v}.
	}
}

For the backlinks, it also uses the Wikipedia API (as the intersection of the following two sets):

Acknowledgements

The research leading to these results has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 611346 and by the German Federal Ministry of Education and Research (BMBF) within the Software Campus project "SumOn" (grant no. 01IS12051).

xLiMe Project

SumOn Project

Contact Andreas Thalhammer.