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ISWC 2025<p>🕒 Time's ticking! ISWC 2025 Poster &amp; Demo deadline is almost here — July 31!</p><p>CfP: <a href="https://iswc2025.semanticweb.org/#/calls/posters" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">iswc2025.semanticweb.org/#/cal</span><span class="invisible">ls/posters</span></a></p><p><a href="https://mastodon.social/tags/ISWC2025" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ISWC2025</span></a> <a href="https://mastodon.social/tags/Posters" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Posters</span></a> <a href="https://mastodon.social/tags/Demos" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Demos</span></a> <a href="https://mastodon.social/tags/SemanticWeb" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SemanticWeb</span></a> <a href="https://mastodon.social/tags/KnowledgeGraphs" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>KnowledgeGraphs</span></a> <a href="https://mastodon.social/tags/LLM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>LLM</span></a> <a href="https://mastodon.social/tags/AI" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AI</span></a> </p><p><span class="h-card" translate="no"><a href="https://mastodon.social/@anligentile" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>anligentile</span></a></span> <span class="h-card" translate="no"><a href="https://mastodon.social/@maribelacosta" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>maribelacosta</span></a></span> <span class="h-card" translate="no"><a href="https://sigmoid.social/@GenAsefa" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>GenAsefa</span></a></span></p>
Harald Sack<p><span class="h-card" translate="no"><a href="https://mastodon.social/@naturzukunft" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>naturzukunft</span></a></span> <br>Actually, this is WIkipedia and only structured data, i.e. no RDF.<br>However, use this SPARQL query on DBpedia to get vitamins and minerals of a cucumber ;-) </p><p><a href="https://dbpedia.org/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&amp;qtxt=SELECT%20*%20WHERE%20%7B%0A%20dbr%3ACucumber%20%3Fp%20%3Fo%20.%20FILTER%20regex%20(%3Fp%2C%20%22%5BMU%5Dg%22).%0A%7D%0A%0A%0A&amp;format=text%2Fhtml&amp;timeout=30000&amp;signal_void=on&amp;signal_unconnected=on" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">dbpedia.org/sparql?default-gra</span><span class="invisible">ph-uri=http%3A%2F%2Fdbpedia.org&amp;qtxt=SELECT%20*%20WHERE%20%7B%0A%20dbr%3ACucumber%20%3Fp%20%3Fo%20.%20FILTER%20regex%20(%3Fp%2C%20%22%5BMU%5Dg%22).%0A%7D%0A%0A%0A&amp;format=text%2Fhtml&amp;timeout=30000&amp;signal_void=on&amp;signal_unconnected=on</span></a></p><p><a href="https://sigmoid.social/tags/sparql" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sparql</span></a> <a href="https://sigmoid.social/tags/rdf" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>rdf</span></a> <a href="https://sigmoid.social/tags/dbpedia" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>dbpedia</span></a> <a href="https://sigmoid.social/tags/wikidata" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>wikidata</span></a> <a href="https://sigmoid.social/tags/cucumber" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>cucumber</span></a> <a href="https://sigmoid.social/tags/dbpedia" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>dbpedia</span></a> <span class="h-card" translate="no"><a href="https://mstdn.social/@dbpedia" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>dbpedia</span></a></span> <a href="https://sigmoid.social/tags/semanticweb" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>semanticweb</span></a> <a href="https://sigmoid.social/tags/knowledgegraphs" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>knowledgegraphs</span></a></p>
ISWC 2025<p>📌 Reminder: ISWC 2025 Posters &amp; Demos Deadline – July 31!<br>Got a tool, prototype, or early-stage idea? Share it with the community at ISWC 2025!</p><p>🗓️ Deadline: July 31, 2025<br> 🔗<a href="https://iswc2025.semanticweb.org/#/calls/posters" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">iswc2025.semanticweb.org/#/cal</span><span class="invisible">ls/posters</span></a></p><p><a href="https://mastodon.social/tags/ISWC2025" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ISWC2025</span></a> <a href="https://mastodon.social/tags/Posters" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Posters</span></a> <a href="https://mastodon.social/tags/Demos" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Demos</span></a> <a href="https://mastodon.social/tags/SemanticWeb" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SemanticWeb</span></a> <a href="https://mastodon.social/tags/KnowledgeGraphs" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>KnowledgeGraphs</span></a> <a href="https://mastodon.social/tags/LLM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>LLM</span></a> <a href="https://mastodon.social/tags/AI" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AI</span></a> </p><p><span class="h-card" translate="no"><a href="https://mastodon.social/@anligentile" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>anligentile</span></a></span> <span class="h-card" translate="no"><a href="https://mstdn.jp/@K_e_n_F" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>K_e_n_F</span></a></span> <span class="h-card" translate="no"><a href="https://mastodon.social/@maribelacosta" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>maribelacosta</span></a></span> <span class="h-card" translate="no"><a href="https://sigmoid.social/@GenAsefa" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>GenAsefa</span></a></span></p>
Harald Sack<p>You are an expert in ontologies and knowledge graphs? You have an interest (or even better expertise) in materials science engineering? Then you should apply! Open PostDoc/Senior Researcher position at FIZ Karlsruhe ISE Research Team in the Knowledge Graph department. More info at <a href="https://www.fiz-karlsruhe.de/en/stellenanzeigen/postdocsenior-researcher-wmx" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">fiz-karlsruhe.de/en/stellenanz</span><span class="invisible">eigen/postdocsenior-researcher-wmx</span></a></p><p><a href="https://sigmoid.social/tags/joboffer" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>joboffer</span></a> <a href="https://sigmoid.social/tags/ontologies" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ontologies</span></a> <a href="https://sigmoid.social/tags/bfo" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>bfo</span></a> <a href="https://sigmoid.social/tags/bfo2020" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>bfo2020</span></a> <a href="https://sigmoid.social/tags/pmd" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>pmd</span></a> <a href="https://sigmoid.social/tags/materialsscience" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>materialsscience</span></a> <a href="https://sigmoid.social/tags/knowledgegraphs" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>knowledgegraphs</span></a> <a href="https://sigmoid.social/tags/jobad" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>jobad</span></a> <a href="https://sigmoid.social/tags/ontologyengineering" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ontologyengineering</span></a> <a href="https://sigmoid.social/tags/semanticweb" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>semanticweb</span></a> <a href="https://sigmoid.social/tags/modeling" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>modeling</span></a> <span class="h-card" translate="no"><a href="https://sigmoid.social/@fizise" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>fizise</span></a></span> <a href="https://sigmoid.social/tags/materialdigital" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>materialdigital</span></a> <a href="https://sigmoid.social/tags/nfdimatwerk" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nfdimatwerk</span></a> <span class="h-card" translate="no"><a href="https://wisskomm.social/@fiz_karlsruhe" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>fiz_karlsruhe</span></a></span></p>
Wikidata<p>What does it take to maintain one of the world's largest repositories of free, structured knowledge? </p><p>Read this interview about the challenges Wikidata faces and how the team handles massive scale and constant updates, all while remaining open source:<br> <a href="https://www.bigdatawire.com/2025/07/10/scaling-the-knowledge-graph-behind-wikipedia/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">bigdatawire.com/2025/07/10/sca</span><span class="invisible">ling-the-knowledge-graph-behind-wikipedia/</span></a> <a href="https://wikis.world/tags/OpenData" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>OpenData</span></a> <a href="https://wikis.world/tags/KnowledgeGraphs" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>KnowledgeGraphs</span></a> <a href="https://wikis.world/tags/BigData" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BigData</span></a> <a href="https://wikis.world/tags/SemanticWeb" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SemanticWeb</span></a></p>
Harald Sack<p>This week our colleagues <span class="h-card" translate="no"><a href="https://fedihum.org/@tabea" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>tabea</span></a></span> and Linnea Söhn presented our joint work at the <a href="https://sigmoid.social/tags/DH2025" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DH2025</span></a> poster presentation at 30+°C outside in Lisbon, Portugal :) </p><p>poster at zenodo: <a href="https://zenodo.org/records/15878213" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">zenodo.org/records/15878213</span><span class="invisible"></span></a></p><p><a href="https://sigmoid.social/tags/dh" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>dh</span></a> <a href="https://sigmoid.social/tags/nfdirocks" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nfdirocks</span></a> <span class="h-card" translate="no"><a href="https://nfdi.social/@nfdi4culture" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>nfdi4culture</span></a></span> <span class="h-card" translate="no"><a href="https://nfdi.social/@NFDI4Memory" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>NFDI4Memory</span></a></span> <span class="h-card" translate="no"><a href="https://nfdi.social/@NFDI4DS" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>NFDI4DS</span></a></span> <a href="https://sigmoid.social/tags/NFDIMatWerk" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NFDIMatWerk</span></a> <a href="https://sigmoid.social/tags/researchdatamanagement" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>researchdatamanagement</span></a> <span class="h-card" translate="no"><a href="https://sigmoid.social/@fizise" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>fizise</span></a></span> <span class="h-card" translate="no"><a href="https://wisskomm.social/@fiz_karlsruhe" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>fiz_karlsruhe</span></a></span> <span class="h-card" translate="no"><a href="https://mastodon.social/@jonatan" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>jonatan</span></a></span> <span class="h-card" translate="no"><a href="https://fosstodon.org/@heikef" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>heikef</span></a></span> <span class="h-card" translate="no"><a href="https://fedihum.org/@sourisnumerique" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>sourisnumerique</span></a></span> <span class="h-card" translate="no"><a href="https://fedihum.org/@linnaea" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>linnaea</span></a></span> <span class="h-card" translate="no"><a href="https://fedihum.org/@sashabruns" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>sashabruns</span></a></span> <span class="h-card" translate="no"><a href="https://blog.epoz.org/" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>epoz</span></a></span> <a href="https://sigmoid.social/tags/ontologies" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ontologies</span></a> <br><a href="https://sigmoid.social/tags/knowledgegraphs" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>knowledgegraphs</span></a> <a href="https://sigmoid.social/tags/semanticweb" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>semanticweb</span></a> <a href="https://sigmoid.social/tags/ai" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ai</span></a></p>
Michael Roberts<p>Hey <span class="h-card" translate="no"><a href="https://mastodon.social/@doriantaylor" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>doriantaylor</span></a></span>, I have some more dumb semantic web questions.</p><p>1. If I *don't* want to use a full existing ontology, because I intentionally want to have a simpler model during early phases of a project, is there a .. I guess a "sanctioned way" to enhance my ontology as time goes on without losing fidelity?</p><p>I know OWL's SameAs can identify individual resources as the same as some other resource, but this would kind of be that, only at the ontological level, maybe.</p><p><a href="https://indieweb.social/tags/SemanticWeb" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SemanticWeb</span></a> <a href="https://indieweb.social/tags/RDF" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RDF</span></a></p>
Harald Sack<p>Yesterday, I've attended the MSE Research Data Forum 2025 organised by <a href="https://sigmoid.social/tags/NFDIMatWerk" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NFDIMatWerk</span></a>. Aside from the conference presentations, our little ontologies group was meeting and discussing future work on ontologies in NFDI-MatWerk, including NFDIcore, MatWerk Application Ontologies, and PMDcore.</p><p><a href="https://nfdi-matwerk.de/nfdi/2025/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">nfdi-matwerk.de/nfdi/2025/</span><span class="invisible"></span></a></p><p><a href="https://sigmoid.social/tags/NFDIrocks" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NFDIrocks</span></a> <span class="h-card" translate="no"><a href="https://sigmoid.social/@joerg" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>joerg</span></a></span> <span class="h-card" translate="no"><a href="https://sigmoid.social/@fizise" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>fizise</span></a></span> <span class="h-card" translate="no"><a href="https://wisskomm.social/@fiz_karlsruhe" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>fiz_karlsruhe</span></a></span> <a href="https://sigmoid.social/tags/mse" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mse</span></a> <a href="https://sigmoid.social/tags/materialsscience" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>materialsscience</span></a> <a href="https://sigmoid.social/tags/ontologies" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ontologies</span></a> <a href="https://sigmoid.social/tags/semanticweb" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>semanticweb</span></a> <a href="https://sigmoid.social/tags/knowledgegraphs" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>knowledgegraphs</span></a></p>
ISWC 2025<p>🎉 Doctoral Consortium Notifications Are Out!</p><p>We're excited to welcome 11 outstanding PhD students to the <a href="https://mastodon.social/tags/ISWC2025" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ISWC2025</span></a> Doctoral Consortium!</p><p>They'll gain valuable mentorship at the premier <a href="https://mastodon.social/tags/SemanticWeb" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SemanticWeb</span></a> event in Japan. <br>📄 Check out their work: <a href="https://iswc2025.semanticweb.org/#/program/acceptedpapers" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">iswc2025.semanticweb.org/#/pro</span><span class="invisible">gram/acceptedpapers</span></a> </p><p>👏 Congratulations!</p><p><span class="h-card" translate="no"><a href="https://mastodon.social/@anligentile" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>anligentile</span></a></span> <span class="h-card" translate="no"><a href="https://mastodon.social/@maribelacosta" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>maribelacosta</span></a></span> <span class="h-card" translate="no"><a href="https://sigmoid.social/@GenAsefa" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>GenAsefa</span></a></span></p>

Tomorrow, we will dive deeper into ontologies with OWL, the Web Ontology Language. However, I'm doing OWL-lectures now for almost 20 years - and OWL as well as the lecture haven't changed much. So, I'm afraid I'm going to surprise/dissapoint the students tomorrow, when I will switch off the presentation and start improvising a random OWL ontology with them on the blackboard ;-)

#ise2025 #OWL #semanticweb #semweb #RDF #knowledgegraphs @fiz_karlsruhe @fizise @tabea @sourisnumerique @enorouzi

OK @doriantaylor (or anybody), one more beginner question. When does a reasoner actually do its work? So, I've got a pile of data in whatever form, and I formulate a query. Then .... what? The reasoner looks at the datatypes in the query and says e.g. "if you're asking for publications that also means books or articles?" Or does it create dummy nodes for the existing data, so there's a publication node for every book and every article?
#rdf #SemanticWeb