Table of Equivalent Numbers

Equivalent Number Table

This table is essentially a selection of the numbers used in the standard Dewey 21 schedule 200s – with at least one equivalent number from this Phoenix schedule for each. Its primary use is to assist in “translating” Dewey 21 numbers, from wherever these may have been acquired, into their Phoenix schedule equivalent.

The following reservations and cautions about its use are important:

· Older works bearing a Dewey number may well have been classified some years ago – possibly under a “former” (pre-21) edition of DDC. While many numbers have remained the same over a number of editions, especially in a relatively static area like the 200s, each edition does typically include revisions and changes. It is obviously not practicable to attempt to cover numbers peculiar to old editions of Dewey in a table like this.

· The old schedule is riddled with “options”. Numbers acquired from CIP (Cataloguing in Publication) data, or from Library of Congress or other shared cataloguing will follow the “preferred” or standard form of the DDC schedule – but this will not necessarily apply to class numbers derived from work in other libraries, especially specialist religious libraries. These may well have followed one or more of the options allowed for in Dewey 21 (or even in older editions, where the available options were in some cases quite different!) and be therefore unusable for your purposes.

· This Phoenix schedule is, generally, more detailed than the equivalent section of DDC 21. The effect of this is that there may very well be a more specific number for the work concerned than the one in this table. On the other hand in a few places – for instance the very comprehensive list of obscure (and mostly American) Christian sects in standard DDC – we have “consolidated” the schedule slightly. This should in theory be less of a problem, but it is still worth watching.

· There are some basic terminological differences between the two schedules. “Comparative religion” and “philosophy of religion”, for instance, tend to overlap much more in this schedule than they do in the standard one (see the manual note at 100 vs. 200). The “Old Testament” of the Christian Bible is for us a primarily Jewish document – whereas in standard Dewey 21 it is essentially treated as Christian property. The total effect of these differences is that some numbers in the old schedule have a degree of ambiguity in the context of the new – and vice versa, of course.

· In any case, this table should not be construed as a simple one to one equivalence between the numbers listed. Always check back in the schedule to make sure that:

1. There is at least a readily identifiable relationship between the number identified in this table and the subject of the work concerned.

2. This subject fits into the general context of the schedule.

3. There is not a more specific number in the schedule, that better defines the subject of the work concerned.

Do not waste time in pursuing any obscure, ambiguous, or otherwise difficult “old” Dewey numbers through this table. If any problems arise – quickly abandon the old number altogether, and simply reclassify the work from scratch. This is likely to be quicker, less intellectually taxing, and more likely to produce an appropriate class number for the work concerned.

In fact, overall the author tends to the view that the use of this table is generally not to be recommended – and he would prefer himself to classify any work without reference to any earlier number it may have acquired. On the other hand (judiciously applied) it may save time for (say) users faced with the task of converting an existing Dewey library to the new schedule, or of adding a pile of “discards” from another (Dewey) library.

Bahá’í users of this schedule, in particular, should note that Dewey numbers in or attached to old Bahá’í works are totally useless – there is essentially only one number for the Faith in the standard schedule (although it has been changed several times over successive editions) – and while this number can in theory be built on to a certain extent, this has in practice hardly ever been done. The rule must be – classify Bahá’í works from scratch!

N.B. This table is not as yet completed – it will probably cover about 20 pages, but its completion is only an issue for libraries needing to convert large quantities of “old” (DDC 21) work to the new schedule.

211 205.11

211.7 212.33

211.709 2 212.333

211.8 212.34

211.8092 212.343

212.7 205.125

215.7 201.757

218 205.3

220 274

220.07 278.764

220.520 3 274.412 3

220.66 274.11

220.68 274.148

220.859 274.175 9

220.93 274.193

220.950 5 274.322 2

224.8 274.436 333

224.91 274.436 343

224.97 274.436 365

226.6 274.474

226.93 274.472 3

228 274.478

229 274.48

229.3 274.483 83

229.5 274.483 853

229.6 274.483 863

229.8 274.487 2

229.913 274.483 93

229.925 274.487 4

229.94 274.487 8

230.041 275.011 4

230.071 1 278.777

230.089 96 275.083 796

231.4 275.125

232.3 275.218 5

232.912 273.132 2

232.914 273.214

232.917 273.215

232.92 273.132

232.933 273.22

232.95 273.133 2

232.97 273.135 7

233 275.3

233.4 275.344

234.1 275.347 53

234.13 275.347 542

234.161 275.347 542

234.161 3 275.347 532 4

234.166 278.86

234.167 278.867

234.5 275.345

235.24 275.271

235.3 275.255

236.23 275.324 8

236.9 275.337

238.11 272.732

238.144 272.736

239 271.4

239.7 271.612 13

239.7 271.612 34

241.5 276.1

241.53 276.13

241.649 57 275.557

241.66 275.322 6

241.66 276.322 6

241.681 276.324 54

241.693 275.442 5

241.695 275.473

241.697 6 276.322 6

242.332 277.32

242.36 277.59

242.4 278.326

242.4 278.326 6

242.5 278.35

242.63 278.323

242.722 274.325

242.75 278.338 2

246 271.77

246.9 271.772

246.97 279.526

247.1 278.837 3

248.46 278.3

248.47 278.4

248.83 275.403

248.84 275.404

248.862 9 275.406 29

254.05 272.768 092 55

255.1 279.565 3

255.17 279.565 317

255.18 279.565 318

255.4 279.565 34

255.52 279.565 352

255.83 279.566

259.23 279.657 53

259.419 697 92 279.863 619 697 92

259.429 279.657 562 9

259.429 2 279.657 562 92

259.6 279.657 566

261.26 271.66

261.513 271.612 374

261.55 271.752

261.55 271.757

261.57 271.77

261.832 29 275.083 629

261.832 71 276.324 742

261.834 235 275.083 3

261.834 24 275.083 4

261.835 736 276.322 2

262.06 272.768 09

262.11 279.611

262.12 279.611 2

262.8 276.321

263.912 277.32

263.925 277.45

263.93 277.59

264.34 278.824

265.1 278.852 2

265.13 278.852 24

265.64 278.866

265.7 278.867

267 279.4

268.433 278.753

268.434 278.754

268.635 278.738 6

270.092 273.611 2

270.1 272.53

271.18 279.565 318

271.4 279.565 34

273.4 272.724

273.6 272.726

281.62 272.742 3

283 272.762

284.3 272.763

284.4 272.767

284.9 272.759

286 272.768

286.092 272.768 03

286.4 272.768

286.7 272.773

286.73 272.773 2

289.1 275.111 3

289.73 272.783 55

289.93 272.797 6

289.94 272.775 3

291.172 205.415 3

291.175 201.752

291.175 201.757

291.175 201.77

291.175 212.374

291.178 322 9 205.083 629

291.178 322 92 209.863 629 2

291.178 327 1 206.324 742

291.178 342 35 205.083 3

291.178 342 4 205.083 4

291.178 357 36 206.322 2

291.178 732 205.635 5

291.2 201.43

291.208 996 205.083 796

291.21 205.113 5

291.211 2 205.115

291.212 205.232 13

291.212 205.232 9

291.213 205.253

291.215 205.255

291.22 205.3

291.22 205.345

291.34 208.862 9

291.37 201.77

291.37 201.772

291.432 208.326 29

291.432 208.326 6

291.440 835 205.403

291.442 205.406 29

291.442 209.863 66

291.446 208.9

291.447 208.4

291.5 205.438

291.562 422 205.635

291.566 205.322 6

291.566 206.322 6

291.568 205.444

291.568 1 206.324 54

291.569 3 205.442 5

291.569 5 205.473

291.569 7 206.324 76

291.569 76 206.322 6

291.61 209.6

291.61 209.657 566

291.65 206.321

291.65 209.4

292.564 957 205.557

294.337 5 241.77

294.343 7 241.77

294.344 47 248.4

294.356 6 245.322 6

294.356 93 245.442 5

294.356 97 248.45

294.356 976 246.322 6

294.382 4 244.44

294.456 97 232.845

294.482 232.44

294.517 5 221.77

294.537 221.77

294.543 6 228.533

294.5447 228.4

294.548 66 225.322 6

294.548 693 225.442 5

294.548 697 228.45

294.548 697 6 226.322 6

294.556 3 222.78 5

294.592 1 224.4

294.592 15 224.45

294.592 4 224.65

294.682 238.44

295.82 258.44

296.120 092 264.518 3

296.123 1 264.553 1

296.123 2 264.553 2

296.123 4 264.553 4

296.123 47 264.553 47

296.123 5 264.553 5

296.123 6 264.553 6

296.124 1 264.554 1

296.124 2 264.554 2

296.124 4 264.554 4

296.125 264.555

296.125 2 264.555 2

296.125 5 264.555 5

296.126 3 264.556 3

296.127 6 264.557 6

296.142 264.572

296.19 264.9

296.3 265.011 4

296.311 2 265.125

296.315 265.255

296.32 265.345

296.35 267.43

296.36 266.1

296.364 957 265.557

296.366 265.322 6

296.366 266.322 6

296.368 1 266.324 54

296.369 3 265.442 5

296.369 5 265.473

296.369 76 266.322 6

296.377 261.77

296.432 267.25

296.442 2 268.852 31

296.442 4 268.852 35

296.443 4 269.852 55

296.45 268.815 4

296.450 4 268.815 2

296.453 2 268.857 25

296.46 261.77

296.493 268.802 3

296.61 269.657 566

296.67 266.321

296.67 269.4

296.680 835 268.753

296.7 268.4

296.708 35 265.403

297.092 283.611

297.122 4 284.41

297.122 68 284.148

297.124 2 284.834 2

297.2 285

297.204 6 282.775

297.211 2 285.125

297.215 285.255

297.22 285.345

297.246 285.217 61

297.246 3 285.217 66

297.267 281.77

297.289 281.612 34

297.29 287.43

297.3 281.77

297.36 287.2

297.38 288.333

297.446 288.588 4

297.48 288.589 51

297.54 288.9

297.566 285.322 6

297.568 1 286.324 54

297.569 5 285.473

297.569 76 286.322 6

297.576 288.4

297.61 289.611

297.633 283.133 7

297.86 282.77

297.87 282.794

297.87 282.794 2

297.870 92 282.794 3

297.92 292.73

297.920 92 292.733

297.93 290

297.930 92 293

299.6 217.6

299.7 217.7

299.8 217.8

299.921 5 217.94

299.935 212.75