<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class="">Dear Markus, </div><div class=""><br class=""></div><div class="">To complete the discussion concerning the difficulties between Vocab 2.0 and the Theory I.G. and more specifically to complete what Hervé said about the specific issue concerning permanent URIs.</div><div class=""><br class=""></div><div class="">The issue of permanent URIs for SKOS concepts for SimDM vocabularies was discussed between the Semantics W.G. and Theory <a href="http://I.G.at" class="">I.G.at</a> the Shangai 2017 InterOp. See Nicolas Moreau's presentation here:</div><div class=""><a href="https://wiki.ivoa.net/internal/IVOA/InteropMay2017-Semantics/Semantic_theory.pdf" class="">https://wiki.ivoa.net/internal/IVOA/InteropMay2017-Semantics/Semantic_theory.pdf</a></div><div class="">and especially the “to do” at the end. </div><div class=""><br class=""></div><div class="">Then, it was discussed again at the College Park 2018 InterOp. </div><div class="">First with presentations by myself both in the Theory and in the Semantics sessions.</div><div class=""><br class=""></div><div class="">During this InterOp we found a solution between the Theory and Semantics W.G. that is written in the conclusions of the InterOp meeting:</div><div class="">* Conclusion Semantics: <a href="https://wiki.ivoa.net/internal/IVOA/InterOpNov2018PlenaryTCG/SemanticsClosingingInteropNov2018.pdf" class="">https://wiki.ivoa.net/internal/IVOA/InterOpNov2018PlenaryTCG/SemanticsClosingingInteropNov2018.pdf</a></div><div class="">* Conclusion Theory: <a href="https://wiki.ivoa.net/internal/IVOA/InterOpNov2018PlenaryTCG/TheoryClosing.pdf" class="">https://wiki.ivoa.net/internal/IVOA/InterOpNov2018PlenaryTCG/TheoryClosing.pdf</a></div><div class=""> </div><div class="">It was decided:</div><div class="">"1 - Conclude on SKOS concepts URIs</div><div class="">During this InterOp, conclusion on Theory SKOS concepts URIs <a href="http://ivoa.net/vocabularies/theory" class="">http://ivoa.net/vocabularies/theory</a>/Vocabulary/Concept<br class="">Publication of Theory vocabularies on ivoa.net/rdf after this InterOp”</div><div class=""><br class=""></div><div class="">Is Vocab 2.0 compatible with these conclusions ? Which solution do you propose ?</div><div class=""><br class=""></div><div class="">Best regards</div><div class="">Franck</div></body></html>