Miscellaneous comment; conversion from GIF comment.
Copyright notice.
Description of image (possibly long).
Legal disclaimer.
A #GeglResolutionUnit specifying units for the image resolution (density).
X resolution or density in dots per unit.
Y resolution or density in dots per unit.
Software used to create the image.
Device used to create the image.
Time of original image creation.
Short (one line) title or caption for image.
Warning of nature of content.
Name of image creator.