Tag Logical Element (TLE) structured field
As mentioned in Tag Logical Element (TLE) structured field, ACIF creates TLE structured fields as part of its indexing process, or it can receive these structured fields from the input print file. When ACIF creates TLE structured fields, the first TLE is INDEX1, the next TLE is INDEX2, and so on to a maximum of eight per page group. When ACIF processes a print file that contains TLE structured fields, it always outputs the TLE structured fields in the same order and position.