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