In order to employ the RMI method for the construction of a VSM at reduced dimension and the estimation of the 1 distance between vectors, two model parameters should be decided: (a) the targeted (reduced) dimensionality of the VSM, which is indicated by m in Equation 8 and (b) the number of non-zero elements in index vectors, which is determined by s in Equation 6.
to the classic one-dimension-per-context-element methods of VSM construction, 10 the value of m in RPs and thus in RMI is chosen independently of the number of context elements in the model (n in Equation 8).