Dear colleagues, We are happy to announce a new stable release (version 2, beta 3) of the NeuroML language for model specification in computational neuroscience. http://www.neuroml.org/getneuroml NeuroML allows specification of models of systems from integrate and fire cells up to complex 3D networks of multicompartmental neurons. NeuroML version 2 has been extensively redesigned to be built on a new language, LEMS, which allows machine readable definitions of model structure and dynamics. This facilitates model transparency, portability and code generation. LEMS and NeuroML 2 are described in detail in: Robert C. Cannon, Padraig Gleeson, Sharon Crook, Gautham Ganapathy, Boris Marin, Eugenio Piasini and R. Angus Silver, *LEMS: A language for expressing complex biological models in concise and hierarchical form and its use in underpinning NeuroML 2*, Frontiers in Neuroinformatics 2014, doi: 10.3389/fninf.2014.00079 There are libraries for reading, writing and simulating NeuroML models in Java (https://github.com/NeuroML/jNeuroML) and Python. The Python APIs for NeuroML and LEMS have recently been described in: Michael Vella, Robert C. Cannon, Sharon Crook, Andrew P. Davison, Gautham Ganapathy, Hugh P. C. Robinson, R. Angus Silver and Padraig Gleeson, *libNeuroML and PyLEMS: using Python to combine procedural and declarative modeling approaches in computational neuroscience*, Frontiers in Neuroinformatics 2014, doi: 10.3389/fninf.2014.00038 The growing number (30+) of tools, libraries and databases supporting NeuroML v1 and/or NeuroML v2 are listed here: http://www.neuroml.org/tool_support Open Source Brain is a repository of models in computational neuroscience which actively supports open, collaborative development of models, as well as conversion to simulator independent formats including NeuroML (over 500 valid NeuroML 2 cells/channels/synapses on OSB at last count). An overview of the models currently present and the formats/simulators supported can be found here: http://www.opensourcebrain.org/status Regards, The NeuroML development community ----------------------------------------------------- Padraig Gleeson Room 321, Anatomy Building Department of Neuroscience, Physiology& Pharmacology University College London Gower Street London WC1E 6BT United Kingdom +44 207 679 3214 p.gleeson@ucl.ac.uk -----------------------------------------------------