Predicting The Future with MFHD

Using MFHD to Predict the Future David J. Fiander

Publication Patterns
Published Monday – Saturday, except for Christmas Day. Issues are identified by date.
Published weekly on Thursday, except for a double issue in the last two weeks of December. Issues are numbered continuously and four volumes are published annually, starting in Jan, Apr, Jul, Oct.
Published bimonthly, except monthly in Jan, Jul, Aug, Dec. Issue numbers restart in each volume, which starts in Jan

Extreme Publication Patterns
Item is published every Monday and Thursday except for when New Years Day, the fourth of July, Labour Day, (American) Thanksgiving, and Christmas fall on a Monday or Thursday

863: Enumeration & Chronology (AKA Holdings Data)
$8: Linkage and sequence number
$a - $f: Enumeration
$i - $l: Chronology
$w: Break indicator
$x, $z: Nonpublic & public notes
863 41 $8 1.1 $a 1 $b 5 $i 1990 $j 05

853: Caption and Pattern 1: Caption
$8: Field link and sequence number
$a - $f: Enumeration
$u: “Bib. units per next higher level”
$v: Numbering continuity
$i - $l: Chronology
853 20 $8 1 $a v. $b no. $u 12 $v r $i (year) $j (month)

Formatting
853 20 $8 1 $a v. $b no. $u 12 $v r $i (year) $j (month)
863 41 $8 1.1 $a 3 $b 5 $i 1990 $j 05
863 41 $8 1.2 $a 3 $b 6 $i 1990 $j 06
863 41 $8 1.3 $a 3 $b 7 $i 1990 $j 07
863 41 $8 1.4 $a 3 $b 8 $i 1990 $j 08
v.3:no.5 (1990:May) – v.3:no.8 (1990:Aug)

853: Caption and Pattern 2: Pattern
$w: Frequency
$x: Calendar change
$y: Regularity pattern
853 20 $81$av.$bno.$u20$vr$i(year)$j(month) $w s $x 01 $y pd01,15 $y od0115,0715,0815,1215

Patterns are Easy for People
Published monthly on the second Wednesday, except in April, when it's published on the second Thursday, and May, when it's published on the first Wednesday.

Patterns are Hard for Computers
$ypw02we # 2 nd We
$ypw0402th,0501we # Apr: 2 nd Th, May:1 st We
$yow0402we,0502we # Not 2 nd We in Apr, May
How do we calculate the date of the issue after 2009/03/11?

Challenges
Quirks in the Standard
Bad data
Poor interoperability between systems

Credits
“ Grandmother Predictions” by Flickr user stevec77. http://www.flickr.com/photos/stevec77/2520256837/
CONSER Publication Patterns Initiative. http://www.loc.gov/acq/conser/patthold.html

Licence
Copyright © 2009, David J. Fiander
This work is licensed under the Creative Commons Attribution-Noncommercial 2.5 Canada License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc/2.5/ca/ or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA.

Predicting The Future with MFHD

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