Old New Name Audience Audn Target audience Base Prme Prime meridian Base Proj Projection Bib lvl Blvl Bibliographic level Cont EntW Nature of entire work (serials only) Ctrl Ctrl Type of control (new element) Dates Dates Date 1 and Date 2 Dat tp DtSt Type of date/Publication status F/B Fict Fiction F/B Biog Biography File File Type of computer file Form SpFm Special format characteristics Frequn Freq Frequency Int lvl Audn Target audience ISDS ISSN ISSN Center Pub st DtSt Type of date/Publication status RecG CrTp Type of cartographic material Regulr Regl Regularity Type Type Type of record--------------------------------------------------------------------------------------------------------------------------------------------
The following codes are valid in all formats:
s Single known date/probable date.
m Multiple dates.
p Date of distribution/release/issue andproduction/recording session when different.
r Reprint/reissue date and original date.
t Publication date and copyright date. (New code that replaces
q Questionable date. (New usage conventions.)
c Serial item currently published. Code c was also used for nonserial items. Now use it exclusively for serial items. Nonserial code c is being converted to code t.
d Serial item ceased publication. Code d was also used for nonserials. Now use it exclusively for serial items. Nonserial code d is being converted to code e.
u Serial item status unknown.
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PROBABLE DATES/UNKNOWN DATES/MISSING DIGITS.
KGE's Rule of thumb: Use TYPE OF DATE code "s" or "m" and a "u" in the DATES field if any digit of the date is uncertain. Use code "q" if the specific range of dates is known.
When a date is probable (for example, the date in 260 has a question mark and there is no other indication of a known date), enter missing digit(s) as U in DATES. (This convention has been the practice for serials, use it for monographs as well.)
For example, for a single date that is probable, enter missing digit(s) as U in the first four positions of DATES, leave the last 4 positions blank, and use code s in DtSt:
* For span of dates associated with a single item of uncertain dates, use code Q in DtSt.
* For multiple certain dates needed for a single item, use code in DtSt.
* If the date is totally unknown, you may infer the millennium (e.g., 1UUU in the first 4 positions of DATES).
* Code for the date you have. Do NOT use Q in DtSt for dates with missing digits.
New or Revised Codes:
"q - questionable date." The exact date for a single date item is unknown, but a range of years for the date can be specified (e.g., between 1824 and 1846). Give the earliest possible date in the first four positions of DATES and the latest possible date in the last four positions of DATES.
"t - publication date and copyright date." Code t is a new code that takes the place of code c in nonserial records. Use it when the dates are the publication date and copyright date. OCLC will convert all code c "Actual date and copyright date" in non serial records to T. Conversion will be announced in PRISM News.
"c - Serial item currently published".
Code c was also "multiple dates/actual date" and "copyright date" "in nonserial records. You should now use code c exclusively for serials for items for which an issue has been received within the last three yearsOCLC will convert code c "actual date and copyright date" in nonserial records to t. Conversion will be announced in PRISM News. Continue to use 9999 in the second 4 positions of DATES for current serial items.
"d - serial item ceased publication". Code d was "single date/detailed" date in nonserial records. You should now use code d exclusively for serials when a serial has ceased to be published or a change in author or title has caused a successive entry record to be made. OCLC will convert code d "detailed date" in nonserial records to code e.
Use when a new title supersedes the previous one. Use only when there is clear evidence that the item has ceased publication. Generally, a period of more than three years during which no new issue has been published is considered clear evidence.
OCLC will convert appropriate DATES information to U and DTST to the correct code in all appropriate records. Conversions will be announced in PRISM News.
"e - bibliographic data." Data are bibliographic citations, including library catalogs or citation databases. May be structured or unstructured.
"f - font." File contains information for a computer to produce fonts.
"g - game." File is for recreational or educational use. Usually text and software, including videogames.
"h - sound." File has data encoding computer producible sounds.
"i - interactive multimedia." Item supports navigation through and manipulation of many kinds of media (audio, video, etc.) in which the user has an almost conversational interaction with the computer and the data.
"j - online system or service". System supports user based interaction, including online library systems, FTP sites, electronic bulletin boards, network information centers. Usually, nonbibliographic information.
FILETYPE OF COMPUTER FILE-(NO CHANGE IN MNEMONIC)
The following new codes are valid:
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3/27/96