e/Multivariate Polya distribution

Information
has gloss	eng: The multivariate Pólya distribution, also called the Dirichlet compound multinomial distribution, is a compound probability distribution, where a probability vector p is drawn from a Dirichlet distribution with parameter vector \alpha, and a set of discrete samples x is drawn from the multinomial distribution with probability vector p. The compounding corresponds to a Polya urn scheme. In document classification, for example, the distribution is used to represent probabilities over word counts for different document types.
lexicalization	eng: Multivariate Polya distribution
instance of	c/Multivariate discrete distributions