One of the main track papers, \u2018Challenges of source selection in the WoD<\/strong>\u2019 (1), presented by Tobias, was selected as a spotlight paper. It argues for a renewed effort to find novel join-cardinality approximation techniques for source selection or a change of paradigm in query execution to settings, after showing the limitations of Bloom Filters.<\/p>\n Tobias presenting \u2018Challenges of source selection in the WoD\u2019<\/p><\/div>\n The second research, \u2018Computing Authoring Tests from Competency Questions: Experimental Validation<\/strong>\u2019 (2), was co-authored by Daniele. The paper experimentally investigates a technique, Competency Question Ontology Authoring, to see if it does what it promises: assess if an ontology is actually capturing users\u2019 expectations.<\/p>\n Daniele and Tobias also presented two papers at the DeSemWeb workshop. Daniele presented a paper titled \u2018On a Web of Data Streams<\/strong>\u2019 (3). Streams are getting more and more popular, but there is no agreement on which protocols and rules we should follow for exchanging and processing them on the web. This article summarizes the requirements we need to address to realize a Web of data streams, and proposes a novel protocol, WeSP, and shows its feasibility.<\/p>\n The other paper, titled \u2018Decentralizing the Semantic Web: Who will pay to realize it?<\/strong>\u2019 (4), was presented by Tobias. The vision of a marketplace for decentralized data following basic Web of Data principles and its challenges were discussed.<\/p>\n A workshop on Web Stream Processing<\/strong>, co-hosted by Daniele, targeted the community interested in stream processing in the semantic web context. The event attracted more than 30 attendees, with six talks discussing ongoing studies on stream processing, from querying streams in the web to theoretical results on stream reasoning.\u00a0(5)<\/p>\n Daniele also co-ran a tutorial called How to Build a Stream Reasoning Application <\/strong>on techniques used to perform reasoning over data streams. After starting with the foundations on extensions of RDF and SPARQL to manage streams, methods to perform DL and ASP were discussed and tried out by the participants. (6)<\/p>\n Finally, Abraham Bernstein and Natasha Noy of Google gave a keynote at the Doctoral Consortium. The keynote named \u201cIs this really Science: Evaluating research contributions\u201d gave an overview to the scientific method and its evaluation in the Semantic Web domain. The keynote was well received \u2013 it was even tweeted about<\/a> by senior researchers from the semantic web community.<\/p>\n Abraham and Natasha presenting (picture by Lora Aroyo via Twitter<\/a>)<\/p><\/div>\n Natasha and Abraham wrote up the key points of the presentation in their report called \u201cIs This Really Science? The Semantic Webber\u2019s Guide to Evaluating Research Contributions\u201d. (7)<\/p>\n It was a fruitful conference at a great venue, and we look forward to the next edition!<\/p>\n The Welcome reception at the Vienna City Hall<\/p><\/div>\n (1) https:\/\/iswc2017.semanticweb.org\/paper-209\/<\/a><\/p>\n (2) \u00a0https:\/\/iswc2017.semanticweb.org\/paper-99\/<\/a><\/p>\n (3) http:\/\/w3id.org\/wesp<\/a><\/p>\n (4)\u00a0 http:\/\/ceur-ws.org\/Vol-1934\/contribution-01.pdf<\/a><\/p>\n (5) http:\/\/streamreasoning.org\/events\/wsp2017<\/a><\/p>\n (6) http:\/\/streamreasoning.org\/events\/streamapp2017<\/a><\/p>\n![\"Tobias](\"https:\/\/www.uzh.ch\/blog\/ifi-ddis\/files\/2017\/11\/ISWC4.jpeg\")
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