The International Conference on Biomedical Ontology (ICBO, http://icbo2015.fc.ul.pt/callworkshops.html) will take place in beautiful Lisbon, Portugal July 26-30 2015. We would like to invite you to submit proposals to host tutorials and/or workshops. Other type of events (clinics, hackathon) will also be considered. TUTORIALS are educational events. They may be either for a full day or for a half day. They should focus on one specific topic presented by one or two experts and involve interaction with the audience. The organizers will be responsible for advertising the tutorial. Tutorials can include hands-on training, in which case the proposal should specify the anticipated requirements (laptops, software to install, etc.). WORKSHOPS provide a forum for the discussion of a specific topic through individual paper presentations; in particular, they should have a specific tangible outcome planned in advance. They may be for either a full day or a half day. The organizers will be responsible for advertising the workshop and reviewing and selecting the contributions. Workshops can also include interest group meetings, or meetings designed to disseminate the results of a research project on a specific topic. Workshop and tutorial proposals should be submitted to the easychair website: https://easychair.org/conferences/?conf=wsicbo2015, in the workshops and tutorials track. Each submission should include the title of the event, name, affiliation and e-mail addresses of the proposers. It should include also a description of the proposed event (maximum 200 words), including an explanation of how the workshop/tutorial will contribute to the field of biomedical ontology. Proposers should describe how they will advertise the event in order to receive a sufficient number of submissions and participants and explain the rationale for addressing their specific topic in the workshop/tutorial rather than in the main conference. One important argument would be to attract more people to ICBO. If the event has been organized in previous editions of ICBO, please indicate some statistics regarding previous attendance for better planning. For more information, please contact icbo2015@googlegroups.com, indicating "[icbo2015] workshops and tutorials" in the subject line. Important dates: Feb 10, 2015: Workshops and tutorials proposals submission deadline Feb 24, 2015: Notification of acceptance of workshops and tutorials Apr 13, 2015: Workshop papers submission deadline May 11, 2015: Notification of workshop paper acceptance May 25, 2015: Camera-ready copies submission deadline July 27-28, 2015: ICBO workshops and tutorials July 29-30, 2015: ICBO main conference