START and END specify the ranges of data dimensions over which certain records apply. In most cases, the records will apply over the full range of all dimensions, so that the values for START will be 1 (or 0, depending on the beginning index value specified in TEST.SPECB.IDXSTART) and -1 for END. (The -1 value indicates the last grid point value, and so the two together will indicate the whole range of a dimension.)