circa	If the manifestation's publication date is approximate, a "c" will appear in this field.
content_note	Notes about the manifestation's content, such as information about the people shown in a photograph.
copyright_cond	Any conditions that are attached to the manifestation's copyright notice.
copyright_note	Notes relating to the copyright statement.
copyright_statement	The copyright statement for the manifestation.
descriptive_note	Notes about the manifestation (not about its contents).
dimensions	The manifestations physical (or electronic?) dimensions.
edition_statement	If the manifestation is part of an edition, this field notes which edition.
extent	How long the manifestation is: number of pages, volumes, etc.
form	What form the source work containing the manifestation has. E.g., book, report, article, photograph, etc.
iss_number	The manifestation's International Standard Serial Number, if it has one.
loc_number	The manifestation's Library of Congress Number, if it has one.
permission_grant_date	Date when the project was given permission to include or use the manifestation, in the XXXX-XX-XX format (year-month-day).
permission_req_date	Date when the project requested permission to include or use the manifestation, in the XXXX-XX-XX format (year-month-day).
publisher	Manifestation's current publisher.
pub_date	Publication date, in the XXXX-XX-XX format (year-month-day), if known.
pub_year	The year of publication.
rep_ref_no1	??
rep_ref_no2	??
source_location_address	If the manifestation is a part of a larger work, such as a photograph in a book, this field specifies the manifestation's exactly location in the source work.
type	The manifestation's type. This field expands on the form field, which describes the source work's form. If the form is a book, the type might be a photograph collection. If the form is a newspaper article, the type might be a photocopy.