MARC21-007: Antecedent/Source of electronic resource
file reproduced from an electronic resource
Electronic resource has been created or copied from an existing electronic resource.
c
E.g., to generate new copies or derivative copies with lower resolution or smaller file size; to process an existing file with Optical Character Recognition - OCR - software; etc.
file reproduced from an intermediate (not microform
Content comprising the electronic resource has been created by reformatting/digitizing from an intermediate other than microform.
d
Common examples of non-microfom intermediates for visual and textual materials are: photocopies, 35 mm film, transparencies, slides, 2nd generation video tape, etc. A common example of an intermediate for audio materials is 2nd generation analog tapes.
file reproduced from microform
Content comprising the electronic resource has been created by scanning from microform.
b
16mm microfilm, 35mm microfilm, 105mm microfiche, microcard, micro-opaque, etc.
file reproduced from original
Content (image, audio, or video) comprising the electronic resource has been created by digitization of the original item.
a
Common examples of original objects include: printed or manuscript texts and/or images that are made on paper or on vellum; photographic prints (and in some instances photographic negatives, depending on creator's intent); analog audio formats; and video formats. This value does not pertain to microform even if microform is the original.
mixed
Images comprising the electronic resource have been created from mixed sources.
m
Portions scanned from original item, portions scanned from microfilm, etc.
not applicable
Antecedent or source are not applicable to this electronic resource.
n
Appropriate for electronic resources other than those created during a reformatting process.
unknown
Antecedent or source of this reformatted electronic resource is not known.
u
Published