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A major advantage of these frameworks is that they do not require precise quantitative data, and that they are well-suited for studies of large networks. While numerous groups have developed specific computational tools that provide original methods to analyse qualitative models, a standard format to exchange qualitative models has been missing.\n  Results: We present the System Biology Markup Language (SBML) Qualitative Models Package ","authors_text":"Andreas Dr\\\"ager, Aurelien Naldi, Axel von Kamp, Benjamin Wicks, Bryan Kowal, Claudine Chaouiya, Denis Thieffry, Duncan Berenguier, Emanuel Gon\\c{c}alves, Finja B\\\"uchel, Hidde de Jong, Ioannis Xenarios, Julien Dorier, Julio Saez-Rodriguez, Martijn P. van Iersel, Michael Hucka, Michel Page, Nicolas Le Nov\\`ere, Nicolas Rodriguez, Pedro T. 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