-------- Original Message --------
Subject:        OCLC QC Tip of the Month Jan. 2011 / Dates of availability for
special formats
Date:   Tue, 4 Jan 2011 12:46:01 -0500
From:   Goodson,Luanne <[log in to unmask]>
Reply-To:       askqc <[log in to unmask]>
To:     <[log in to unmask]>



This message is being widely cross-posted.

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New text added to Bibliographic Formats and Standards: Dates of first
availability in history for some non-book formats

Bibliographic Formats and Standards (BFAS) Field 260 $c
_http://www.oclc.org/bibformats/en/2xx/260.shtm_has been updated with
dates of first availability for the following formats: COM (electronic
resources), REC (sound recordings), and VIS (visual materials).

Items which have previously been published in a different physical
format than the one they are now available in often lack a new date of
publication. AACR2 requires that catalogers make an educated guess as to
the current date of publication when one cannot be determined. Knowing
when a physical format first became commercially available helps in
making such a determination.

To help catalogers, the following information has been added to the
guidelines found under field 260 $c for each format:


COM guidelines for ‡c

These are the dates of first availability (publication) of some of the
major computer file media. Dates earlier than these cannot be a proper
date of publication for that computer file medium. Earlier dates may
represent such bibliographic events as release date in a different
computer file medium, etc.


3 1/2 inch floppy disk: 1982
5 1/2 inch floppy disk: 1976
8 inch floppy disk: 1971
CD-ROM: 1985
DVD-ROM: 1996
Electronic files remotely accessed via the World Wide Web: 1991



REC guidelines for ‡c

If the date of recording differs from the date of publication, enter the
recording in coded form in field 033 and in textual form in field 518.

033 0 0 1961----
260 [New York] : ‡b Music Guild, ‡c 1971.
518 Recorded in 1961.

These are the dates of first availability (publication) of some of the
major audio media. Dates earlier than these cannot be a proper date of
publication for that audio medium. Earlier dates may represent such
bibliographic events as date of sound capture, release date in a
different audio medium, etc.


Audio cassette: 1965
Audio CD: 1982
DVD-Audio: 2000
LP: 1948
Playaway: 2005
Reel-to-reel tape: 1954
Streaming audio: 1999



VIS guidelines for ‡c

These are the dates of first availability (publication) of some of the
major videorecording media. Dates earlier than these cannot be a proper
date of publication for that videorecording medium. Earlier dates may
represent such bibliographic events as release date in a different
videorecording medium, etc.


Beta cassettes: 1975
Blu-ray disc: 2006
CAV (Constant Angular Velocity) standard play laser optical discs: 1978
CLV (Constant Linear Velocity) standard play laser optical discs: 1978
CED (Capacitance Electronic Disc) video discs: 1981
DVD-Video: 1996 (Japan); 1997 (USA)
Streaming video: 1999
U-matic/U-standard cassettes: 1971
VHS cassettes: 1976



Please send any questions or concerns to: [log in to unmask]

Luanne Goodson
Consulting Database Specialist
OCLC Quality Control Section
6565 Kilgour Place MC 139
Dublin, Ohio, USA 43017-3395