Field Tests
A field test specifies a restriction for a particular TIFF field.
A TIFF field consists of a TIFF tag, type, count, and values. The
following can be tested:
- A TIFF field is present
- An invalid TIFF tag is present
- The TIFF field type equals one of a list of specified numbers
- The TIFF field count equals one of a list of specified numbers
- The first field value equals one of a list of specified numbers
- The first field value does not equal any of a list of specified numbers
- The first field value equals the value of another TIFF field
- The first field value does not equal the value of another TIFF field