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multimericScrolling past the Royal Flying Doctor Service website for the 100th time as I Google for the RDF Schema documentation<a href="https://genomic.social/tags/semanticweb" class="mention hashtag" rel="nofollow noopener" target="_blank">#semanticweb</a> <a href="https://genomic.social/tags/rdf" class="mention hashtag" rel="nofollow noopener" target="_blank">#rdf</a> <a href="https://genomic.social/tags/rdfs" class="mention hashtag" rel="nofollow noopener" target="_blank">#rdfs</a> <a href="https://genomic.social/tags/owl" class="mention hashtag" rel="nofollow noopener" target="_blank">#owl</a>

Jeen<a href="https://genomic.social/@multimeric" class="u-url mention" rel="nofollow noopener" target="_blank">@multimeric</a> I think they serve different purposes. <a href="https://mastodon.nz/tags/rdfs" class="mention hashtag" rel="nofollow noopener" target="_blank">#rdfs</a> is not really a schema language, at least not in the "here is a prescribed structure you can validate against" sense. It was more intended as a descriptional thing, something to define basic vocabulary ("my model is about kinds of vehicles, like cars, and bikes"). A lightweight ontology language if you will. SHACL is about setting structure constraints, and data validation. They're complementary IMO.

multimericRDF people: why does everyone still use RDFS and not SHACL for writing schemas, when all the actual validation tools are for SHACL?Are there even any RDFS validators? I can't find any.<a href="https://genomic.social/tags/rdf" class="mention hashtag" rel="nofollow noopener" target="_blank">#rdf</a> <a href="https://genomic.social/tags/semanticweb" class="mention hashtag" rel="nofollow noopener" target="_blank">#semanticweb</a> <a href="https://genomic.social/tags/rdfs" class="mention hashtag" rel="nofollow noopener" target="_blank">#rdfs</a> <a href="https://genomic.social/tags/shacl" class="mention hashtag" rel="nofollow noopener" target="_blank">#shacl</a>

Harald SackVersion 1.0 of the JavaScript <a href="https://sigmoid.social/tags/shacl" class="mention hashtag" rel="nofollow noopener" target="_blank">#shacl</a> library shacl-engine is out. here are no breaking changes, only new features, but to indicate that this package is production ready, the version was lifted from 0.x to 1.x. via ThomasBergwinkl@LinkedIn <a href="https://mastodon.social/@bergi" class="u-url mention" rel="nofollow noopener" target="_blank">@bergi</a> <a href="https://github.com/rdf-ext/shacl-engine" rel="nofollow noopener" translate="no" target="_blank">https://github.com/rdf-ext/shacl-engine</a><a href="https://sigmoid.social/tags/shack" class="mention hashtag" rel="nofollow noopener" target="_blank">#shack</a> <a href="https://sigmoid.social/tags/semanticweb" class="mention hashtag" rel="nofollow noopener" target="_blank">#semanticweb</a> <a href="https://sigmoid.social/tags/sparql" class="mention hashtag" rel="nofollow noopener" target="_blank">#sparql</a> <a href="https://sigmoid.social/tags/rdf" class="mention hashtag" rel="nofollow noopener" target="_blank">#rdf</a> <a href="https://sigmoid.social/tags/rdfs" class="mention hashtag" rel="nofollow noopener" target="_blank">#rdfs</a> <a href="https://sigmoid.social/tags/javascript" class="mention hashtag" rel="nofollow noopener" target="_blank">#javascript</a>

Harald SackIn the <a href="https://sigmoid.social/tags/ISE2024" class="mention hashtag" rel="nofollow noopener" target="_blank">#ISE2024</a> lecture today, we will discuss RDF as basic building block for the Web of Data.slides: <a href="https://drive.google.com/file/d/1gJ3RD3Sz2JuEpCF-mBBfA85boYP_jrON/view?usp=drive_link" rel="nofollow noopener" translate="no" target="_blank">https://drive.google.com/file/d/1gJ3RD3Sz2JuEpCF-mBBfA85boYP_jrON/view?usp=drive_link</a><a href="https://sigmoid.social/tags/semanticweb" class="mention hashtag" rel="nofollow noopener" target="_blank">#semanticweb</a> <a href="https://sigmoid.social/tags/knowledgegraphs" class="mention hashtag" rel="nofollow noopener" target="_blank">#knowledgegraphs</a> <a href="https://sigmoid.social/tags/rdf" class="mention hashtag" rel="nofollow noopener" target="_blank">#rdf</a> <a href="https://sigmoid.social/tags/rdfs" class="mention hashtag" rel="nofollow noopener" target="_blank">#rdfs</a> <a href="https://sigmoid.social/tags/WebOfData" class="mention hashtag" rel="nofollow noopener" target="_blank">#WebOfData</a> <a href="https://sigmoid.social/@fizise" class="u-url mention" rel="nofollow noopener" target="_blank">@fizise</a> <a href="https://sigmoid.social/@MahsaVafaie" class="u-url mention" rel="nofollow noopener" target="_blank">@MahsaVafaie</a> <a href="https://sigmoid.social/@enorouzi" class="u-url mention" rel="nofollow noopener" target="_blank">@enorouzi</a> <a href="https://sigmoid.social/@shufan" class="u-url mention" rel="nofollow noopener" target="_blank">@shufan</a> <a href="https://fedihum.org/@sourisnumerique" class="u-url mention" rel="nofollow noopener" target="_blank">@sourisnumerique</a>

jonny (good kind)<a href="https://hachyderm.io/@hrefna" class="u-url mention" rel="nofollow noopener" target="_blank">@hrefna</a> you're so deeply right in this thread. this essentially defines the early and formative years of <a href="https://neuromatch.social/tags/RDF" class="mention hashtag" rel="nofollow noopener" target="_blank">#RDF</a> and <a href="https://neuromatch.social/tags/RDFS" class="mention hashtag" rel="nofollow noopener" target="_blank">#RDFS</a> around some key decisions. There is so much worry about errors from mishandling, but the very possibility of expressing something that could be wrong. There is so much here it's hard to even know where to start but from the very start of the rdf-core and especially rdf-logic mailing lists the emphasis on correctness of expression vs. agency of interpretation is heated. This is a pretty unsubtle example: <a href="https://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2001Nov/0423.html" rel="nofollow noopener" translate="no" target="_blank">https://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2001Nov/0423.html</a><blockquote>"Summary: RDF is not just a data model. The RDF specs should define a semantics so that an RDF statement on the web is interpreted as an assertion of that statement such that its author would be responsible in law as if it had been published in, say, a newspaper."</blockquote>affirmed by this text: <a href="https://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2002Jun/0180.html" rel="nofollow noopener" translate="no" target="_blank">https://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2002Jun/0180.html</a><blockquote>"The RDFCore WG takes the view that RDF/XML documents, ie. encodings of RDF graphs, are represenations of claims or assertions about the world. [...] we note that RDF graphs are the kind of things that can be true or false (rather than 'mere bytes'). For each linear syntax of RDF, there will be conventions (social, legal) for indicating which chunks of data are encodings of RDF graphs in that syntax, and thus of propositional content."</blockquote>So ya very very early they had decided that RDF was intended to be platonic representation of the world - it is a method of making propositions that must directly bear on the world, there is no ambiguity, there are only true or false things. (There's a lot of subtlety in that but yno.)Another thing that comes to mind is the discussion of monotonicity that happens throughout, that's also tied up with the discussion of closed worldedness, containers, and whether or not things belong in sets for the purpose of local meaning or need to belong to the One Great Uniform Graph. It must be impossible for adding new triples into the reasoner to make it less certain of some outcome (ie. if it was possible for ambiguity to be introduced eg. by tangled type hierarchies etc.). This thread is all very illustrative but this message is super spicy and also touches on what you're talking about re using the level of granularity you care about: <a href="https://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2001Nov/0363.html" rel="nofollow noopener" translate="no" target="_blank">https://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2001Nov/0363.html</a><a href="https://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2001Nov/0381.html" rel="nofollow noopener" target="_blank">this quote</a> from D bricks is also pretty telling of the epistemological commitments: "RDF Schema is not about policing the content of specific descriptions 'what is said'; it's about policing what is sensibly sayable."

jonny (good kind)<a href="https://neuromatch.social/tags/RDFS" class="mention hashtag" rel="nofollow noopener" target="_blank">#RDFS</a> has a generic container type And RDFs has a label property to set something's name. And skos has a canonical sameAs property.And containment indicates relative location And a location relative to an absolute location has an absolute location. And multiple routes to a location can be indicated to be the same object.So why are there all these damn bnodes in my JSON-LD representations

Harald SackIn the next section in this week's <a href="https://sigmoid.social/tags/kg2023" class="mention hashtag" rel="nofollow noopener" target="_blank">#kg2023</a> online lecture you will learn about vocabularies and how to design simple models with the RDF Schema Description Language RDFS. video lecture: <a href="https://open.hpi.de/courses/knowledgegraphs2023/items/2fLyYCsLoiikZJCuCjjspY" rel="nofollow noopener" translate="no" target="_blank">https://open.hpi.de/courses/knowledgegraphs2023/items/2fLyYCsLoiikZJCuCjjspY</a> <a href="https://sigmoid.social/tags/OpenHPI" class="mention hashtag" rel="nofollow noopener" target="_blank">#OpenHPI</a> <a href="https://wisskomm.social/@fiz_karlsruhe" class="u-url mention" rel="nofollow noopener" target="_blank">@fiz_karlsruhe</a> <a href="https://sigmoid.social/@fizise" class="u-url mention" rel="nofollow noopener" target="_blank">@fizise</a> <a href="https://fedihum.org/@tabea" class="u-url mention" rel="nofollow noopener" target="_blank">@tabea</a> <a href="https://fedihum.org/@sashabruns" class="u-url mention" rel="nofollow noopener" target="_blank">@sashabruns</a> <a href="https://sigmoid.social/@enorouzi" class="u-url mention" rel="nofollow noopener" target="_blank">@enorouzi</a> <a href="https://sigmoid.social/tags/knowledgegraphs" class="mention hashtag" rel="nofollow noopener" target="_blank">#knowledgegraphs</a> <a href="https://sigmoid.social/tags/mooc" class="mention hashtag" rel="nofollow noopener" target="_blank">#mooc</a> <a href="https://sigmoid.social/tags/lecture" class="mention hashtag" rel="nofollow noopener" target="_blank">#lecture</a> <a href="https://sigmoid.social/tags/semanticweb" class="mention hashtag" rel="nofollow noopener" target="_blank">#semanticweb</a> <a href="https://sigmoid.social/tags/rdf" class="mention hashtag" rel="nofollow noopener" target="_blank">#rdf</a> <a href="https://sigmoid.social/tags/rdfs" class="mention hashtag" rel="nofollow noopener" target="_blank">#rdfs</a> <a href="https://sigmoid.social/tags/startrek" class="mention hashtag" rel="nofollow noopener" target="_blank">#startrek</a>

Christopher PollinAn online workshop on "Introduction to LOD: From Digital Scholarly Editions and Text Collections to the Web of Data" will be held at the University of Rostock on 20 and 21 September, 9-16 Uhr <a href="https://fedihum.org/tags/SemanticWeb" class="mention hashtag" rel="nofollow noopener" target="_blank">#SemanticWeb</a>, <a href="https://fedihum.org/tags/RDF" class="mention hashtag" rel="nofollow noopener" target="_blank">#RDF</a>, <a href="https://fedihum.org/tags/RDFS" class="mention hashtag" rel="nofollow noopener" target="_blank">#RDFS</a>, <a href="https://fedihum.org/tags/Ontology" class="mention hashtag" rel="nofollow noopener" target="_blank">#Ontology</a> + <a href="https://fedihum.org/tags/DigitalEdition" class="mention hashtag" rel="nofollow noopener" target="_blank">#DigitalEdition</a>.<a href="https://dhd-blog.org/?p=19908" rel="nofollow noopener" target="_blank">https://dhd-blog.org/?p=19908</a>

Netzwerk Offenes MittelalterIch <a href="https://fedihum.org/@chpollin" class="u-url mention" rel="nofollow noopener" target="_blank">@chpollin</a> unterrichte auch am ZIM in Graz zum Thema Semantic Web. Meine Lehrmaterialien können gerne verwendet werden. Es gibt Folien und Screencasts zu <a href="https://fedihum.org/tags/RDF" class="mention hashtag" rel="nofollow noopener" target="_blank">#RDF</a>, <a href="https://fedihum.org/tags/RDFS" class="mention hashtag" rel="nofollow noopener" target="_blank">#RDFS</a>, <a href="https://fedihum.org/tags/SPARQL" class="mention hashtag" rel="nofollow noopener" target="_blank">#SPARQL</a> und <a href="https://fedihum.org/tags/Ontology" class="mention hashtag" rel="nofollow noopener" target="_blank">#Ontology</a>: <a href="https://github.com/chpollin/Teaching/tree/master/InfoMod" rel="nofollow noopener" target="_blank">https://github.com/chpollin/Teaching/tree/master/InfoMod</a>Screencasts auf YouTube: <a href="https://youtu.be/reLxbnYVZbY" rel="nofollow noopener" target="_blank">https://youtu.be/reLxbnYVZbY</a>(alle CC-BY)

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