Technical Definition
Provides the measure unit for all values except the font size.
Usage Notes
The default value is 1/10 of mm.
Category Notes
This field is common in ALTO files. For all, string-choice: “pixel”, “mm10” or “inch1200”.
Instantiations
| CAAL | alto\Description\MeasurementUnit | MCH | inch1200 |
| DEAL | alto\Description\MeasurementUnit | MCH | pixel |
| EUAL | alto\Description\MeasurementUnit | MCH | mm10 |
| F1AL | alto\Description\MeasurementUnit | MCH | mm10 |
| F2AL | pageOCRDATA\content\altoXML\alto\Description\MeasurementUnit | MCH | mm10 |
| PPAL | alto\Description\MeasurementUnit | MCH | mm10 |
| TRAL | alto\Description\MeasurementUnit | MCH | pixel |