Dear PSICQUIC community, The PSI-MI meeting is approaching and I have prepared a document that would summarize the discussions we had about PSI-XML 3.0 at the PSI MI meeting last year and at the cooperative interaction hackathon last may. As designing PSI-XML 3.0 is not a simple decision and will impact the full PSI-MI community, I have prepared a questionnaire that anyone interested in improving our PSI-MI XML standard can answer. This way everybody has a chance to give his/her opinion and ideas for PSI-XML 3.0 that will be taken into account even if you cannot come to the meeting this year. There are no mandatory questions, you can answer to whatever question you are interested in and leave the rest blank. Please fill in as many answers as possible so that our new format can suit everybody's needs. This questionnaire has several sections and can give you a pretty good idea of what will be discussed this year for PSI-XML 3.0: 1) Simple feedback to understand who is using the current PSI-XML 2.5 format and what could be the existing issues. The current schema has been released for a long time now, I am sure you have plenty of comments to do here! 2) Several proposals to improve existing elements 3) Several proposals to add new elements that would require minor changes to the existing schema 4) Several proposals about how to represent interactor sets 5) Several proposals about how to represent stable complexes/abstract interactions 6) Several proposals about how to represent cooperative interactions (pre-assembly, allostery, etc.) 7) Several proposals about how to represent dynamic interactions and variable parameters 8) Several proposals about how to represent causal relationships For each proposal, I gave examples and also some context information (see google document https://docs.google.com/document/d/1b4lrUI7PH5uU2rcLMGTZtCf3k8bfjAsqlQyGKKuJN7U). If you have any issues accessing this document, don't hesitate to contact me. The questionnaire is available here https://docs.google.com/forms/d/1jIRYtySVEHRxGGvEtyXUFXN59qKPZTQ38DYP6j_Bw6A/viewform and will be opened until mid April. If there is anything you want to add to the discussion list for PSI-XML 3.0 that is not covered by the questionnaire/document, please do not hesitate to contact me so I can make sure that your idea/comments will not be forgotten at the PSI-MI meeting in April. Regards, Marine