The THIRD LINE denotes how the model will be estimated. In the text above, ALL indicates that all of the items in the data file will be examined. To delineate particular items to include, one would list them as follows: "IT=(1,2,3,4,6,7,8,9,10)" where the 5th item is excluded from the analyses.
Because we wish to use the Nominal model, "NO" is indicated. The number of categories (options) for each of the items must be specified as well a. Since all of our 10 items have 5 options each we type "NC=(5,5,5,5,5,5,5,5,5,5)". One shortcut that is possible in this case is "NC=(5(0)10)" which indicates the same thing -10 items, each with 5 options. If we had 5 items of 4 options followed by 6 items of 5 options in our measure we would indicate "NC=(4,4,4,4,4,5,5,5,5,5,5)". Items keyed as "high" on the measure must be delineated with the Nominal model. This is done by stating which option for each item is "keyed": "HI=(5,5,5,5,5,5,5,5,5,5)". Alternatively, we could use a shortcut instead, "HI=(5(0)10). If our measure used all 4's for the "keyed" option except for the last item, where 5 is used, we could indicate "HI=(4,4,4,4,4,4,4,4,4,5)".