Workshop on Ontology Design and Patterns (12th edition) - WOP2021 will take place at the 20th International Semantic Web Conference, ISWC2021, virtually, in October 2021 <https://iswc2021.semanticweb.org<https://iswc2021.semanticweb.org/>> Workshop Website: <http://ontologydesignpatterns.org/wiki/WOP:2021> **EXTENDED** Submission deadline (papers and patterns): July 19, 2021 Call for Papers --- We invite submissions to the 12th Workshop on Ontology Design and Patterns (WOP2021) to be held in conjunction with the International Semantic Web Conference (ISWC) that will take place online from Oct. 24 to 28, 2021. WOP2021 is a full-day workshop consisting of three parts: paper presentations, a poster session, and an interactive breakout discussion session. The workshop aims to discuss issues of quality in ontology design. In particular, it focuses on the role and use of ontology design patterns (ODPs) for data and knowledge engineering in the Semantic Web, as related to the ontologydesignpatterns.org<http://ontologydesignpatterns.org/> initiative. The increased attention to ODPs in recent years through their interaction with emerging trends of Semantic Web such as knowledge graphs can be attributed to their benefit for knowledge engineers and Semantic Web developers. Such benefits come in the form of direct link to requirements, reuse, guidance, and better communication. The workshop's aim is to: 1) provide an arena for discussing patterns, pattern-based ontologies, systems, datasets, and 2) broaden the pattern community by developing its own "discourse" for discussing and describing relevant problems and their solutions. Topics --- We particularly welcome contributions on topics concerning development of high-quality ontologies in general (with or without the help of ODPs) as well as studies and applications of ODPs for knowledge graph construction and maintenance. In addition, as usual we also welcome pattern descriptions of all sorts, including patterns geared towards applications in specific domains such as geosciences, biomedical science, digital humanities, or e-commerce. The main topics of interest are: 1) Use of ontology design patterns for any kind of knowledge engineering, including - Pattern-based ontology design, conceptual modeling or knowledge engineering broadly - Use in knowledge graphs or linked data settings (including pattern-driven linking or data publishing) - Pattern-based information extraction, ontology learning, and relation to NLP - Use in streaming, ingesting or evolving knowledge - Use of patterns for ontology evaluation, quality assurance, ontology selection, integration or alignment - Pattern-based development of semantic applications - Reasoning with patterns (including automated reasoning, verification, or contextual reasoning) 2) Methods and tools for developing high-quality ontologies (with or without the help of patterns), including - Ontology engineering by domain experts - Quality attributes or metrics in ontologies and ontology engineering - Quality assurance approaches for ontology engineering - Critical analysis of the design of existing ontologies, and proposals on how to improve the design, possibly by using ODPs 3) Development or analysis of ontology design patterns, including - Pattern extraction - Analyses of ontology design patterns or their uses - Antipatterns and their relations to ODPs 4) Development and use of patterns in specific domains, including - Date lakes, business intelligence, or Big Data integration - Geosciences, life sciences, engineering, digital humanities, cultural preservation - IoT, smart homes & cities, smart agriculture - Semantic technology including social networks, semantic wikis or blogs Submissions --- We invite the submission of original research results related to the focus areas of the workshop, in one of three categories given below. All submissions are requested through EasyChair. 1) Research papers (maximum 15 pages LNCS style) presenting mature work and established results. 2) Short papers (maximum 5 pages LNCS style) presenting proposed research directions, novel ideas, or more general positions or discussions. 3) Ontology Design Patterns (5-12 pages LNCS style) should solve a particular modelling problem, of relevance either to the broader ontology engineering community, or to some specific knowledge domain, in a novel and reusable manner. Pattern serialization must be made available, ideally at a permanent IRI. When preparing the camera-ready version, patterns must additionally be submitted through the ontologydesignpatterns.org<http://ontologydesignpatterns.org/> community portal, as described at http://ontologydesignpatterns.org/wiki/WOP:2021/Submission. Submissions should be made via <https://easychair.org/my/conference?conf=wop2021>. Detailed instructions can be found at the submission page <http://ontologydesignpatterns.org/wiki/WOP:2021/Submission>. Important Dates: Anywhere on Earth! --- Papers submissions: July 19, 2021 Papers notifications: August 8, 2021 Camera-ready version submissions: September 1, 2021 Workshop will be held on October 24, 2021 Proceedings --- Accepted research papers and pattern descriptions will be published online as CEUR-Workshop Proceedings. WOP2021 Chairs --- - Karl Hammar, Jönköping University, SWE (general chair) - Cogan Shimizu, Kansas State University, USA (papers co-chair) - Hande Kucuk McGinty, Ohio University, USA (papers co-chair) - Luigi Asprino, University of Bologna, IT (patterns co-chair) - Valentina Anita Carriero, University of Bologna, IT (patterns co-chair)