12 Lost in the Dewey woods: Forestry 634.9

As a forestry professional (recently retired!), I’ve naturally collected a lot of books and reports pertaining to Forestry and Forest Products, in their various manifestations. My struggles with classifying these documents started with the Oxford Decimal Classification (ODC) system, which was my first introduction to this delectable pastime!

I’ve finally relocated my copy of the ODC, from one of the hundred boxes that I brought back from New Delhi to Bangalore on retiring, so let me share something about this classification system just for Forestry. Its original version was devised in large part by Swiss forester Philipp Flury, a member of the Bibliographical Committee of the International Union of Forest Research Organisations (IUFRO) by 1933, and assigned the decimal notation 634.9F to distinguish it from the head 634.9 in the Universal Decimal Classification (UDC). One of the Chairmen of the Committee was Prof. R.S.Troup (Oxford), which establishes a strong Indian connection, Troup being one of the best known British Indian foresters and author of many volumes on Indian Silviculture from the Forest Research Institute, Dehradun. A completely revised version of the ODC was prepared by a post-war Committee, largely by P.G.Beak, Assistant Director of the Bureau, and presented by Ford Robertson, Director of the Commonwealth Forestry Bureau, Oxford in 1948, and after discussions, was adopted in the IUFRO Congress in Rome in September 1953.

The ODC groups the field of Forestry into ten broad classes, starting with 0, for "General works on forests, forestry and the utilisation of forest products", through 1 (Factors of the environment, Biology), 2 (Silviculture), 3 (Work Science, harvesting), 4 (Forest injuries and protection), 5 (Forest mensuration), 6 (Forest management), 7 (Marketing, economics of forest transport and wood industries), 8 (Forest products and their utilisation), and 9  (Forests and forestry from the national point of view, social economics of forestry). The application of sciences like genetics, botany and ecology are covered under 1.

An interesting aspect is that the UDC (Universal Decimal Classification), the European version of the DDC, now uses 630 for Forestry (rather than Dewey’s 634.9, which fits between 634 Horticulture and 635 Gardening), and recommends the use of ODC numbers (with an interpolated asterisk) to form class numbers: thus, 630*1 for "Environmental factors, forest biology", 630*2 for "Silviculture", and so on. (My source for UDC numbers was the International Medium Edition, FID publication no.571, BS 1000M: Part 1: 1985). This combination of two systems provided fairly detailed heads, but there were confusions still, especially for general works on forest economics and history, which are somewhat repetitious in the ODC.

An interesting feature of UDC is the provision for making composite numbers from two different numbers or concepts, using the colon (:) as the connector or concatenator. This is a neat device that enables you to create new categories to your heart’s content. Thus if you want to make a new heading for the effect of climate on forests, you can just take the numbers for Forestry  and for Climate, and join them with the colon. I found this especially useful in joining Forest Management to Community Participation for documents on Joint Forest Management (JFM), thus 630*6:364.462 – the first number is UDC 630 with ODC 6 for “Forest management”, the latter number UDC 364.462 referring to “Participation of the people in decision-making. Democratization. Grass-roots democracy”, which fits exactly. Instead of 630*6, we could use 630*9, the 9 from ODC representing “Forests and forestry from the national point of view. Social economics of forestry”. There’s no separate category for JFM in the UDC or the DDC, as it is something that has developed only in the last two decades. 

The possible downside of this creative license is that each person can form their own new categories, and standardisation is lost. Dewey doesn’t allow this freedom. Any synthesis of numbers from different parts of the DDC has to be done only where expressly permitted, and then as per the instructions provided. Yes, there is one provision in the Standard Subdivisions, applicable to more or less any number from 000 to 999, which lets you relate the subject to to any scientific aspect by adding 01 as a connector, followed by the number from the Sciences (510 to 590). Thus, "Application of the principles of plant genetics to forestry" 634.9’0158115, from 634.9 Forestry and 581.15 Genetics, under the number 581 Botany (we are talking about DDC 20 here; the corresponding number in DDC 22 would be 581.3, Genetics and evolution, under 581 Specific topics in natural history of plants). Unfortunately this nifty trick isn’t provided for with subjects under Technology (600’s), as 016… introduces "Indexes", not application of 600 subject heads; and 019 is "Psychological principles", not the subject in relation to "Geography and travel"!

There are a few numbers to which the entire gamut of subject headings 001 to 999 can be added, such as 338 Production economics, which allows any subject to be related thus.  Also, the Standard Subdivisions do provide a general rule for appending reference to "Place" from Table 2 to any subject number, with the connector ’09: ’094 is Europe, ’095 Asia and so forth (the apostrophe is just a mark to group digits, and need not be shown in actual numbers). This is probably the most widely used mode of subdivision of a topic, and neatly groups documents by continent and country. In some numbers, the 9 need not even be added, as it is already provided in the main number: for instance, Standard Subdivision ’060’3-9, for Organizations in different countries, leaves out the connecting 9, thus 634.9’0604 Forestry organisations in Europe, and so on.

All such aids are welcome, for the DDC 634.9 Forestry is woefully underpopulated compared to ODC. Further, forestry subjects are scattered between 634.9 (forestry), 639.9 (biodiversity conservation), and 333.75 (forest lands), not to mention "forest ecology" under 577.3 (DDC 22). I will present some of the compound numbers I use to gerrymander forestry topics into the DDC mode in the next section.

04 The DDC hundred Divisions

Before we go on to list the thousand Dewey subject numbers and subject headings, let’s take a look at the broader structure. The DDC groups all subjects in TEN broad CLASSes, each starting with a round ‘hundreds’ number:

000      Generalities (Computer Science, Information, and General Works)

100      Philosophy and Psychology

200      Religion

300      Social Sciences

400      Language (and Linguistics)
500      Natural Sciences and Mathematics

600      Technology (Applied Sciences)

700      Arts (and Recreation)

800      Literature800 Literature

900      Geography and History (and Biography)

So these are the ‘Hundreds’. All the 900s – that means the numbers 900 to 999 - cover the field of Geography and History, and so on. Each of the Hundreds Classes is subdivided into ten DIVISIONS each (900 to 909, 910 to 919, and so on), each Division into ten SECTIONS. Ten Classes, into ten Divisions, into ten Sections each: totalling up to 10 X 10 X 10 = a 1000 Section numbers, a thousand subject heads.

I've put the hundred Divisions on their own Page...see the tabs at the top of the screen.

So where does the ‘Decimal’ in the DDC come in? That’s because the subdividing doesn’t stop here; the process goes right on, except that a decimal point is put after the 3-digit number. Thus 910 can be subdivided into ten sub-classes (910.0 to 910.9), each of these could be further divided into ten sub-sub-classes (910.90 to 910.99), and so on… to as many levels as we wanted. Strictly, the numbers ending in zero after the decimal point (like 910.0) are not given separate mention, so the total number of subdivisions may be 9, not 10 for each level. Each number is associated with an individual subclass of the main subject. This is usually set down in detail for each number, as each subject will be broken down in a domain-specific manner, but there are some broad conventions, such as .01 refers to the ‘philosophy’ or ‘theory’ of the main subject. There is in fact a Table of Standard Subdivisions, which we will describe later.

03 The Dewey Decimal scheme: playing by numbers

Now we can address the core problem, which is: how to arrange our non-fiction (the ‘subject-matter’) books in a meaningful manner. The basic premise is, of course, that we can identify one main subject of each book or report in our hands. Dewey has done half our job by listing out a thousand main subject names, starting not from 1, but 000, to 999, in a remarkably prescient manner which conforms neatly to the usual practice in our own computer age (all the numbers are 3-digit ones, hence can perfectly fitted into a fixed field in a database structure).

For the first round of classification, perhaps this is all that we will need to arrange our books subject-wise. Within each subject, naturally we will be arranging our books by the alphabetical ordering of author last-names, thus (Richard) Dawkins would come after (Charles) Darwin. If you had two books by Dawkins, you would arrange them by their date of (first) publication. These three fields: DDC three-digit code number, Author name, and Year, would suffice to order your books in a perfectly predictable sequence.

The whole structure depends on the expectation that any new subject could be ‘adjusted’ under these thousand heads. If you did have a subject that didn’t fit into a single one of them, of course you’d have a problem…then there would have to be a sufficient number of ‘empty’ numbers to cater to these eventualities. In practice, most subjects could be fitted as a sub-category under the thousand main categories provided by Dewey.

One great feature of this system is that if you walked into any library or looked up any catalogue that also followed the same classification scheme (the DDC in this case), you would expect to find your favourite books and authors in the same sequence. If you were interested in say Physics, you would zero in on the 500s; if in History and Geography, on the 900s. These are the Dewey 'hundreds', which bring together related subjects in groups. A little down the line, you will be glibly talking in numbers rather than in names. Unlike bookshops, where each manager devices an individual scheme of arranging the subjects, in academic and public libraries, all of them follow the same. This is spoilt to some extent by the fact that there are two or three main systems; fortunately, the second most common, the Universal Decimal Classification (UDC) closely follows the DDC, and the hundreds numbers are all quite similar.

01 What this is about

How do we manage our acquisitions of books, papers, magazines, tapes, CDs and other things we just can't bring ourselves to give away? These are the things that in a way define our life experience, our travel through the world. They've kept us company through happy days and sad, through exciting times and dull periods. But left to themselves, they become almost useless as they are all jumbled up, they get tucked away in dusty corners and tattered cardboard boxes in the basement, and they introduce health-threatening clutter and disorder.

This question may not loom very large at the beginning of our acqisitorial lives, but a few years down the line, a few shifts of residence, and the issue of keeping, storing, and retrieving them at our will and convenience, becomes important.

My own response was to take the bull by the horns, grasp the nettle, and organize my books and music using recognized classification schemes like the Dewey Decimal Classification (DDC), although there are other... especially the one I started with, the Universal Decimal scheme (UDC), and for Forestry (my profession), a modification of it called the Oxford (ODC). Let me share my experiences in the hope that it may be of some help to some blighted soul groaning under the weight of all that rubbish.... but organized even imperfectly, can be enjoyed and used by self and others...