| 摘要 |
<p>A scannable form (10) for use in an optical mark reading system has a timing track that is pre-encoded with data information known or determined prior to a respondent completing the scannable form. The data information is pre-encoded in the control mark column (12) on the scannable form by utilizing that portion of the control mark column that is not essential for conveying the scan control information associated with the scan control marks (14). The data information is encoded using data marks (20) that represent the data information in a binary or other similar coding technique. The data marks are column-aligned with the scan control marks in the control mark column.</p> |
