List-Style Specification of Q Matrix Variables in Q3 Model
Use this field to specify those variables containing either the columns of the Q matrix or the matrix containing principal components analysis (PCA) assignments for the Q3 model, when there are more variables than can be conveniently selected. These columns should be either numbered sequentially or contain a common prefix.
Refer to the List-Style Specification documentation for information on the use and required syntax of this feature.