Enumerated data type used to describe the target object of a permission request.

Values:

IG_PDF_PERM_REQ_OBJ_DOC	1	Document.
IG_PDF_PERM_REQ_OBJ_PAGE	2	Page.
IG_PDF_PERM_REQ_OBJ_LINK	3	Link.
IG_PDF_PERM_REQ_OBJ_BOOKMARK	4	Bookmark.
IG_PDF_PERM_REQ_OBJ_THUMBNAIL	5	Thumbnail.
IG_PDF_PERM_REQ_OBJ_ANNOT	6	Annotation.
IG_PDF_PERM_REQ_OBJ_FORM	7	Form.
IG_PDF_PERM_REQ_OBJ_SIGNATURE	8	Signature.
IG_PDF_PERM_REQ_OBJ_LAST	9	Used for checking cache size.