item.indexes.intercepts
a numeric vector indicating which item is assoicated with the lamdba intercept
at the given index and thus allowing for equality constraints. For example, with nitems = 3,
this is c(1, 1, 1), that implies that intercept lambdas across items should be contrained to equality.
item.indexes.main.effects
a numeric vector indicating which item is assoicated with the lamdba main effect
at the given index and thus allowing for equality constraints. For example, with nitems = 3,
this is c(1, 1, 1), that implies that main effect (and higher order) lambdas
across items should be contrained to equality.
required.attributes.lambda
a nclasses by nitems matrix with each cell containing a String
representing the attributes required for the given class and item specific to lambda parameters.