|
The PMML spec for support vector machines includes an attribute, svmRepresentation, whose value can be either "SupportVectors" or "Coefficients". The spec indicates that the Coefficients representation is used only with linear SVMs, and specifies the coefficients of the features (i.e. the primal representation of the hyperplane) rather than the coefficients of support vectors, and that no SupportVectors elements are used in the PMML. However, the spec only discusses the format of the Coefficients element in the case that that support vector representation is used, not the case where the primal coefficients are specified instead. Nor is the format described in PMML in Action. Has anyone seen a more-or-less official description of the format for this case? Or know of a tool that produces PMML representations of linear SVMs using this option? |
