The Metadata Editor has
an auditor to help you comply with the metadata standard
you are using. The auditor marks empty required fields with auditing
symbols that look like caution signs .
These symbols also appear
on the tabs along the left side of the Metadata Editor to
indicate errors in that section. If no auditing symbol is displayed
on a tab, the auditor found no errors in that section.
Once an acceptable value
is entered into the field, or other fields in the same field group,
the auditing symbol will not be displayed the next time you click Audit.