One would think that, but with AST's generated from 'normal' text (not code), they're actually quite noisy, and lexical and syntactic features have been more us

One would think that, but with AST's generated from 'normal' text (not code), they're actually quite noisy, and lexical and syntactic features have been more useful[1]. In traditional authorship attribution, AST's are a about decade-old technology. But then, this is code, so for all I know, very different. PS: 1] shows that using AST's does does not get you THAT much of entropy gain compared to other features. 1: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=6234420 http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=6234420