Page 97 - DLIS002_KNOWLEDGE ORGANIZATION CLASSIFICATION AND CATALOGUING THEORY

Knowledge Organization: Classification and Cataloguing Theory

Notes analogous array, with the same concepts expressed by the same final digits. A simple example
is in 611 ‘Anatomy’, parts of which are parallel to 616 ‘Pathology’, where both are subdivided
into particular organs. There is more detail under 616 (the pathology of particular organs), but
it would not matter which was chosen as the main place: the point is that they are parallel, and
to enumerate organs fully in both places would be a waste of effort. Instead, we have parallel
division indicated, e.g. at 611.2 ‘Respiratory system’ (divided like 616.21/.26), or at 611.3 ‘Digestive
system’ (divided like 616.3). In these cases, the 616 subdivisions are the source numbers, from
which digits may be detached and added to the target numbers under 611; thus 616.21 gives us
the analogous 611.21, while 616.31 gives us 611.31, and so on. The parallel arrays may be
represented symmetrically:
611.21 Nose. Sinuses 616 .21

.22 Larynx (voice-box) .22
.23 Trachea (windpipe) .23
.24 Lungs .24

.25 Pleurae .25
.26 Diaphragm .26

!

Caution The numbers in the left-hand column represent these organs in the context of
anatomy, while those in the right-hand column represent them in the context of pathology.
The list of organs is the same.

5.4.3 Citation Order

Citation order is simply the order in which you combine the elements when you build a compound
number.

1. When using the linking signs ( 7.3.6.1), to build a compound class mark, cite the numbers
in ascending order, e.g.

69+72 Building and architecture
624+69+72 Civil engineering, building and architecture
622:69 Mining in relation to building

2. When using different kinds of auxiliary subdivisions added to a main number, cite them
in the reverse of the filing order, e.g.

622"18"(430) = 112.2 Mining - 19th century - Germany - in German
The order can be varied for particular purposes, e.g. to produce a list in place order:
(410)622 Britain - mining

(430)622 Germany - mining
or to give greater priority to any element in a compound number by citing it first, e.g.
725.5:364-54-053.2 Children’s homes (to file under architecture rather than welfare) but if
in doubt, follow the standard order.

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