Thanks to Sir Tim Berners-Lee's World-Wide Web, anyone armed with little more than a lot of computer knowledge, an Internet connection and some free software can set up a website free for anyone to use. Each site can contain an essentially unlimited amount of information on any topic its administrator chooses. If you want to, you can set up a website to disseminate the kind of knowledge previously only attainable from a public library.
One of the problems with this unlimited ability to store and communicate information is filtering out what you need to know from the vast multitudes of trivia that are constantly vying for your attention. In the context of setting up a website to replicate the functionality of a public library, we need look no further than the original tangible places to see the solution their administrators came up with.
In his August 2007 speech The Deep History of the Information Age, Alex Wright gives a pretty interesting overview of various people's attempts to solve this problem over the ages.
The most popular method of categorising information was published by Melvil Dewey in his gripping 1876 page-turner A Classification and Subject Index for Cataloguing and Arranging the Books and Pamphlets of a Library. This is the system familiar to pretty much anyone who's used a public library. According to Wikipedia, which is itself a website that stores vast amounts of knowledge, there are 200,000 libraries in at least 135 countries that use modern variants of Dewey's system of classification.
Based upon the previous work of Sir Francis Bacon (of "knowledge is power" fame) and William Torrey Harris, Dewey's original system grouped the sum of all human knowledge into ten broad categories, each of which was further subdivided into another ten, then again into another ten, giving any conceivable topic a handy three digit reference number. For example, science is number 500 (and therefore any number beginning with a 5), and within it, astronomy is 520 (and anything beginning with 52), and 522 in particular is practical astronomy.
Dewey's system was far from perfect. It focused mostly on knowledge that would interest an American in the nineteenth century, which often seems laughable or at least lamentable in this era of globalisation.
It has since been updated many times in order to rectify this, but I'm concerning myself with the original 1876 list of categories, flawed as they are, for one simple reason: as long as you don't mention its name, Dewey's system of classification is in the public domain, so you're free to use the system on your own websites. Indeed, you could even use it for your own bookshelves should you actually have enough books to warrant it. Using a more recent version of the list, or declaring yourself to be using Dewey's system by name, is not advisable for legal reasons.
Thankfully, the original book listing all the categories in the first version of Dewey's system has been published by Project Gutenberg, which is itself a website that houses over 30,000 books that anyone is free to download and read at their leisure.
It didn't take me too long to devour the list of categories presented in this book, and mangle them into a computer-friendly format. I present them here for your own use, in the hope that more websites might spring up that present vast sums of human knowledge in a way that is somewhat easy to navigate.
Here's the data in the form of tab separated values:
ID Parent Level Category name 000 NULL 1 General 010 000 2 Bibliography 011 010 3 General Bibliographies 012 010 3 Special Forms 013 010 3 Special Forms: Manuscripts 014 010 3 Special Forms: Anonyms, Pseudonyms, etc. 015 010 3 Special Countries 016 010 3 Special Subjects 017 010 3 Subject Catalogues 018 010 3 Authors' Catalogues 019 010 3 Library Economy and Reports 020 000 2 Book Rarities 021 020 3 Manuscripts 022 020 3 Block Books 023 020 3 Early Printed 024 020 3 Celebrated Printers 025 020 3 Celebrated Binders 026 020 3 Materials 027 020 3 Ownership 028 020 3 Prohibited 029 020 3 Other 030 000 2 General Cyclopedias 031 030 3 American 032 030 3 English 033 030 3 German 034 030 3 French 035 030 3 Italian 036 030 3 Spanish 037 030 3 Slavic 038 030 3 Scandinavian 039 030 3 Other 040 000 2 Polygraphy 041 040 3 American 042 040 3 English 043 040 3 German 044 040 3 French 045 040 3 Italian 046 040 3 Spanish 047 040 3 Slavic 048 040 3 Scandinavian 049 040 3 Other 050 000 2 General Periodicals 051 050 3 American 052 050 3 English 053 050 3 German 054 050 3 French 055 050 3 Italian 056 050 3 Spanish 057 050 3 Slavic 058 050 3 Scandinavian 059 050 3 Other 060 000 2 General Societies 061 060 3 American 062 060 3 English 063 060 3 German 064 060 3 French 065 060 3 Italian 066 060 3 Spanish 067 060 3 Slavic 068 060 3 Scandinavian 069 060 3 Other 100 NULL 1 Philosophy 102 100 3 Compends 103 100 3 Dictionaries 104 100 3 Essays 105 100 3 Periodicals 106 100 3 Societies 107 100 3 Education 109 100 3 History 110 100 2 Metaphysics 111 110 3 Ontology 112 110 3 Methodology 113 110 3 Cosmology 130 100 2 Anthropology 131 130 3 Mental Physiology and Hygiene 132 130 3 Mental Derangements 133 130 3 Delusions, Witchcraft, Magic 134 130 3 Mesmerism 135 130 3 Sleep, Dreams, Somnambulism 136 130 3 Sexes 137 130 3 Temperaments 138 130 3 Physiognomy 139 130 3 Phrenology 140 100 2 Schools of Psychology 141 140 3 Idealistic 142 140 3 Critical 143 140 3 Intuitive 144 140 3 Empirical 145 140 3 Sensational 146 140 3 Materialistic 147 140 3 Pantheistic 148 140 3 Eclectic 149 140 3 Other 150 100 2 Mental Faculties 151 150 3 Intellect 152 150 3 Sense 153 150 3 Understanding 154 150 3 Memory 155 150 3 Reason 156 150 3 Imagination 157 150 3 Susceptibility 158 150 3 Instincts 159 150 3 Will 160 100 2 Logic 161 160 3 Inductive 162 160 3 Deductive 163 160 3 Assent 170 100 2 Ethics 171 170 3 Theoretical 172 170 3 State 173 170 3 Family 174 170 3 Business 175 170 3 Amusements 176 170 3 Sexual 177 170 3 Social 178 170 3 Temperance 179 170 3 Other 180 100 2 Ancient Philosophies 181 180 3 Oriental 182 180 3 Early Greek 183 180 3 Sophistic and Socratic 184 180 3 Platonic 185 180 3 Aristotelian 186 180 3 Pyrrhonist and New Platonist 187 180 3 Epicurean 188 180 3 Stoic 189 180 3 Patristic 190 100 2 Modern Philosophies 191 190 3 Scotch and American 192 190 3 English 193 190 3 German 194 190 3 French 195 190 3 Italian 196 190 3 Spanish 197 190 3 Arabian 198 190 3 Scholastic 199 190 3 Other 200 NULL 1 Theology 201 200 3 Philosophy 202 200 3 Compends 203 200 3 Dictionaries 204 200 3 Essays 205 200 3 Periodicals 206 200 3 Societies 207 200 3 Education 209 200 3 History 210 200 2 Natural Theology 211 210 3 Theism and Atheism 212 210 3 Pantheism 213 210 3 Creation 214 210 3 Providence 215 210 3 Religion and Science 216 210 3 Evil 217 210 3 Prayer 218 210 3 Future Life 220 200 2 Bible 221 220 3 Old Testament 222 220 3 Old Testament: Historical Books 223 220 3 Old Testament: Poetical Books 224 220 3 Old Testament: Prophetical Books 225 220 3 New Testament 226 220 3 New Testament: Gospels and Acts 227 220 3 New Testament: Epistles 228 220 3 New Testament: Apocalypse 229 220 3 Apocrypha 230 200 2 Doctrinal Theology 231 230 3 God 232 230 3 Christ 233 230 3 Man 234 230 3 Salvation 235 230 3 Angels 236 230 3 Death and Resurrection 237 230 3 Future State 238 230 3 Inspiration 239 230 3 Apologetics 240 200 2 Practical and Devotional 241 240 3 Didactic 242 240 3 Meditative 243 240 3 Hortatory 244 240 3 Ritual 245 240 3 Hymnology 246 240 3 Public Worship 247 240 3 Social Worship 248 240 3 Private Worship 249 240 3 Religious Fiction and Anecdote 250 200 2 Homiletical and Pastoral 251 250 3 Homiletics 252 250 3 Sermons 253 250 3 Sermons: Doctrinal 254 250 3 Sermons: Practical 255 250 3 Sermons: Religion and Science 256 250 3 Sermons: Political 257 250 3 Sermons: Ordination 258 250 3 Sermons: Expository 259 250 3 Sermons: Commemorative 260 200 2 Institutions and Missions 261 260 3 Church 262 260 3 Church: Ecclesiastical Polity 263 260 3 Sabbath 264 260 3 Baptism 265 260 3 Lord's Supper 266 260 3 Missions 267 260 3 Missions: Foreign 268 260 3 Sunday Schools 269 260 3 Revivals 270 200 2 Ecclesiastical History 271 270 3 Religious Orders 272 270 3 Persecutions 273 270 3 Doctrines 274 270 3 Europe 275 270 3 Asia 276 270 3 Africa 277 270 3 North America 278 270 3 South America 279 270 3 Oceanica 280 200 2 Christian Sects 281 280 3 Oriental 282 280 3 Roman Catholic 283 280 3 English and Protestant Episcopal 284 280 3 Presbyterian 285 280 3 Congregational 286 280 3 Baptist 287 280 3 Methodist 288 280 3 Unitarian and Universalist 289 280 3 Other Christian Sects 290 200 2 Non-Christian Religions 291 290 3 Comparative Mythology 292 290 3 Greek and Roman Mythology 293 290 3 Norse Mythology 294 290 3 Brahmanism and Buddhism 295 290 3 Parseeism 296 290 3 Judaism 297 290 3 Mohammedanism 298 290 3 Mormonism 299 290 3 Other 300 NULL 1 Sociology 301 300 3 Philosophy 302 300 3 Compends 303 300 3 Dictionaries 304 300 3 Essays 305 300 3 Periodicals 306 300 3 Societies 309 300 3 History 310 300 2 Statistics 311 310 3 Methods 312 310 3 Progress of Population 313 310 3 Progress of Civilization 314 310 3 Europe 315 310 3 Asia 316 310 3 Africa 317 310 3 North America 318 310 3 South America 319 310 3 Oceanica 320 300 2 Political Science 321 320 3 Patriarchal Institutions 322 320 3 Feudal Institutions 323 320 3 Monarchic Institutions 324 320 3 Republican Institutions 325 320 3 Colonies and Emigration 326 320 3 Slavery 327 320 3 Foreign and Domestic Relations 328 320 3 Legislative Annals 329 320 3 Political Essays and Speeches 330 300 2 Political Economy 331 330 3 Capital and Labor 332 330 3 Banks and Money 333 330 3 Stocks, Rents, and Income 334 330 3 Credit and Interest 335 330 3 Communism 336 330 3 Public Funds and Taxation 337 330 3 Protection and Free Trade 338 330 3 Production 339 330 3 Pauperism 340 300 2 Law 341 340 3 International 342 340 3 Constitutional and Administrative 343 340 3 Statute and Common 344 340 3 Equity 345 340 3 Criminal 346 340 3 Maritime 347 340 3 Martial 348 340 3 Civil and Canon 349 340 3 Evidence and Forms of Practice 350 300 2 Administration 351 350 3 Civil Service 352 350 3 Civil Service: Treasury 353 350 3 Civil Service: Interior 354 350 3 Civil Service: Police 355 350 3 Army 356 350 3 Army: Infantry 357 350 3 Army: Cavalry 358 350 3 Army: Artillery 359 350 3 Navy 360 300 2 Associations and Institutions 361 360 3 Charitable 362 360 3 Religious 363 360 3 Political 364 360 3 Reformatory and Sanitary 365 360 3 Prisons 366 360 3 Secret Societies 367 360 3 Trades Unions 368 360 3 Insurance 369 360 3 Other 370 300 2 Education 371 370 3 Teachers, Methods, and Discipline 372 370 3 Elementary 373 370 3 Higher 374 370 3 Self-Education 375 370 3 Classical and Real 376 370 3 Female 377 370 3 Religious and Secular 378 370 3 Schools and Colleges 379 370 3 Reports 380 300 2 Commerce and Communication 381 380 3 Domestic Trade 382 380 3 Foreign Trade 383 380 3 Post Office 384 380 3 Telegraph 385 380 3 Railroad and Express 386 380 3 Canal Transportation 387 380 3 River and Ocean Transportation 388 380 3 City Transit 389 380 3 Weights and Measures 390 300 2 Customs and Costumes 391 390 3 Ancient 392 390 3 Medieval 393 390 3 Modern 394 390 3 Modern: Europe 395 390 3 Modern: Asia 396 390 3 Modern: Africa 397 390 3 Modern: North America 398 390 3 Modern: South America 399 390 3 Modern: Oceanica 400 NULL 1 Philology 401 400 3 Philosophy 402 400 3 Compends 403 400 3 Dictionaries 404 400 3 Essays 405 400 3 Periodicals 406 400 3 Societies 407 400 3 Education 408 400 3 Universal Language 409 400 3 History 410 400 2 Comparative 411 410 3 Orthography 412 410 3 Etymology 413 410 3 Dictionaries 414 410 3 Phonology 415 410 3 Grammar 416 410 3 Prosody 417 410 3 Inscriptions 418 410 3 Texts 419 410 3 Hieroglyphics 420 400 2 English 421 420 3 Orthography 422 420 3 Etymology 423 420 3 Dictionaries 424 420 3 Synonyms 425 420 3 Grammar 426 420 3 Prosody 427 420 3 Dialects 428 420 3 Texts 429 420 3 Anglo-Saxon 430 400 2 German 431 430 3 Orthography 432 430 3 Etymology 433 430 3 Dictionaries 434 430 3 Synonyms 435 430 3 Grammar 436 430 3 Prosody 437 430 3 Dialects 438 430 3 Texts 439 430 3 Dutch and Low German 440 400 2 French 441 440 3 Orthography 442 440 3 Etymology 443 440 3 Dictionaries 444 440 3 Synonyms 445 440 3 Grammar 446 440 3 Prosody 447 440 3 Dialects 448 440 3 Texts 449 440 3 Old French, Provencal 450 400 2 Italian 451 450 3 Orthography 452 450 3 Etymology 453 450 3 Dictionaries 454 450 3 Synonyms 455 450 3 Grammar 456 450 3 Prosody 457 450 3 Dialects 458 450 3 Texts 459 450 3 Romansh and Wallachian 460 400 2 Spanish 461 460 3 Orthography 462 460 3 Etymology 463 460 3 Dictionaries 464 460 3 Synonyms 465 460 3 Grammar 466 460 3 Prosody 467 460 3 Dialects 468 460 3 Texts 469 460 3 Portuguese 470 400 2 Latin 471 470 3 Orthography 472 470 3 Etymology 473 470 3 Dictionaries 474 470 3 Synonyms 475 470 3 Grammar 476 470 3 Prosody 477 470 3 Dialects 478 470 3 Texts 479 470 3 Medieval Latin 480 400 2 Greek 481 480 3 Orthography 482 480 3 Etymology 483 480 3 Dictionaries 484 480 3 Synonyms 485 480 3 Grammar 486 480 3 Prosody 487 480 3 Dialects 488 480 3 Texts 489 480 3 Modern Greek 490 400 2 Other Languages 491 490 3 Chinese 492 490 3 Egyptian 493 490 3 Semitic 494 490 3 Indian 495 490 3 Iranian 496 490 3 Keltic 497 490 3 Slavic 498 490 3 Scandinavian 499 490 3 Other 500 NULL 1 Natural Science 501 500 3 Philosophy 502 500 3 Compends 503 500 3 Dictionaries 504 500 3 Essays 505 500 3 Periodicals 506 500 3 Societies 507 500 3 Education 508 500 3 Travels 509 500 3 History 510 500 2 Mathematics 511 510 3 Arithmetic 512 510 3 Algebra 513 510 3 Geometry 514 510 3 Trigonometry 515 510 3 Conic Sections 516 510 3 Analytical Geometry 517 510 3 Calculus 518 510 3 Quaternions 519 510 3 Probabilities 520 500 2 Astronomy 521 520 3 Theoretical 522 520 3 Practical 523 520 3 Descriptive 524 520 3 Maps 525 520 3 Observations 526 520 3 Figure of the Earth 527 520 3 Navigation 528 520 3 Almanacs 529 520 3 Chronology 530 500 2 Physics 531 530 3 Mechanics 532 530 3 Hydrostatics 533 530 3 Pneumatics 534 530 3 Acoustics 535 530 3 Optics 536 530 3 Heat 537 530 3 Electricity 538 530 3 Magnetism 539 530 3 Molecular Physics 540 500 2 Chemistry 541 540 3 Theoretical 542 540 3 Experimental 543 540 3 Analysis 544 540 3 Analysis: Qualitative 545 540 3 Analysis: Quantitative 546 540 3 Inorganic 547 540 3 Organic 548 540 3 Crystallography 549 540 3 Mineralogy 550 500 2 Geology 551 550 3 Physical Geography, Meteorology 552 550 3 Lithology 553 550 3 Dynamical Geology 554 550 3 Europe 555 550 3 Asia 556 550 3 Africa 557 550 3 North America 558 550 3 South America 559 550 3 Oceanica 560 500 2 Paleontology 561 560 3 Plants 562 560 3 Invertebrates 563 560 3 Invertebrates: Protozoa and Radiates 564 560 3 Invertebrates: Mollusca 565 560 3 Invertebrates: Articulates 566 560 3 Vertebrates 567 560 3 Vertebrates: Fishes 568 560 3 Vertebrates: Reptiles and Birds 569 560 3 Vertebrates: Mammals 570 500 2 Biology 571 570 3 Prehistoric Archaeology 572 570 3 Ethnology 573 570 3 Natural History of Man 574 570 3 Homologies 575 570 3 Evolution 576 570 3 Embryology 577 570 3 Spontaneous Generation 578 570 3 Microscopy 579 570 3 Collectors' Manuals 580 500 2 Botany 581 580 3 Physiological 582 580 3 Systematic 583 580 3 Ornamental 584 580 3 Europe 585 580 3 Asia 586 580 3 Africa 587 580 3 North America 588 580 3 South America 589 580 3 Oceanica 590 500 2 Zoology 591 590 3 Comparative Anatomy 592 590 3 Invertebrates 593 590 3 Invertebrates: Protozoa and Radiates 594 590 3 Invertebrates: Mollusca 595 590 3 Invertebrates: Articulates 596 590 3 Vertebrates 597 590 3 Vertebrates: Fishes 598 590 3 Vertebrates: Reptiles and Birds 599 590 3 Vertebrates: Mammals 600 NULL 1 Useful Arts 601 600 3 Philosophy 602 600 3 Compends 603 600 3 Dictionaries 604 600 3 Essays 605 600 3 Periodicals 606 600 3 Societies 607 600 3 Education 608 600 3 Patents 609 600 3 History 610 600 2 Medicine 611 610 3 Anatomy 612 610 3 Physiology 613 610 3 Hygiene 614 610 3 Public Health 615 610 3 Materia Medica and Therapeutics 616 610 3 Pathology, Theory and Practice 617 610 3 Surgery and Dentistry 618 610 3 Obstetrics and Sexual Science 619 610 3 Veterinary Medicine 620 600 2 Engineering 621 620 3 Mechanical 622 620 3 Topographical 623 620 3 Military 624 620 3 Bridge 625 620 3 Road and Railroad 626 620 3 Canal 627 620 3 Harbor 628 620 3 Hydraulic and Mining 629 620 3 Instruments and Field Books 630 600 2 Agriculture 631 630 3 Soil and Preparation 632 630 3 Pests and Hindrances 633 630 3 Productions of the Soil 634 630 3 Fruits 635 630 3 Garden 636 630 3 Domestic Animals 637 630 3 Dairy 638 630 3 Bees and Silkworm 639 630 3 Fishing, Trapping 640 600 2 Domestic Economy 641 640 3 Cookery 642 640 3 Confectionery 643 640 3 Food and Dining 644 640 3 Fuel and Lights 645 640 3 Furniture 646 640 3 Clothing and Toilet 647 640 3 Servants 648 640 3 Laundry 649 640 3 Nursery and Sick-Room 650 600 2 Communication and Commerce 651 650 3 Writing 652 650 3 Writing: Penmanship 653 650 3 Writing: Short Hand 654 650 3 Telegraphy 655 650 3 Printing 656 650 3 Navigation and Transportation 657 650 3 Book-Keeping 658 650 3 Business Manuals 659 650 3 Other 660 600 2 Chemical Technology 661 660 3 Chemicals 662 660 3 Pyrotechnics 663 660 3 Wines, Liquors, and Ales 664 660 3 Sugar, Salt, Starch, etc. 665 660 3 Gas 666 660 3 Glass 667 660 3 Dyeing and Bleaching 668 660 3 Assaying 669 660 3 Metallurgy 670 600 2 Manufactures 671 670 3 Metals 672 670 3 Metals: Iron 673 670 3 Marble, Stone, and Brick 674 670 3 Wood 675 670 3 Leather and Rubber 676 670 3 Paper 677 670 3 Textile Fabrics 678 670 3 Textile Fabrics: Cotton 679 670 3 Other 680 600 2 Mechanic Trades 681 680 3 Watch and Instrument-Making 682 680 3 Blacksmithing 683 680 3 Lock and Gun-Making 684 680 3 Carriage and Cabinet-Making 685 680 3 Saddlery and Shoe-Making 686 680 3 Book-Binding 687 680 3 Clothes-Making 689 680 3 Other 690 600 2 Building 691 690 3 Materials 692 690 3 Plans and Specifications 693 690 3 Masonry 694 690 3 Carpentry 695 690 3 Slating and Tiling 696 690 3 Plumbing 697 690 3 Warming and Ventilation 698 690 3 Painting, Glazing, and Paper-Hanging 699 690 3 Car and Ship-Building 700 NULL 1 Fine Arts 701 700 3 Philosophy 702 700 3 Compends 703 700 3 Dictionaries 704 700 3 Essays 705 700 3 Periodicals 706 700 3 Societies 707 700 3 Education 708 700 3 Galleries 709 700 3 History 710 700 2 Landscape Gardening 711 710 3 Parks 712 710 3 Private Grounds 713 710 3 Walks and Drives 714 710 3 Water 715 710 3 Trees and Hedges 716 710 3 Plants and Flowers 717 710 3 Arbors 718 710 3 Monuments 719 710 3 Cemeteries 720 700 2 Architecture 721 720 3 Architectural Construction 722 720 3 Ancient and Oriental 723 720 3 Medieval 724 720 3 Modern 725 720 3 Public Buildings 726 720 3 Church 727 720 3 School 728 720 3 Domestic and Rural 729 720 3 Of Special Countries 730 700 2 Sculpture 731 730 3 Materials and Methods 732 730 3 Ancient 733 730 3 Ancient: Greek and Roman 734 730 3 Medieval 735 730 3 Modern 736 730 3 Carving 737 730 3 Numismatics 738 730 3 Pottery and Bronzes 739 730 3 Collections 740 700 2 Drawing and Design 741 740 3 Free-Hand 742 740 3 Perspective 743 740 3 Art Anatomy 744 740 3 Mathematical Drawing 745 740 3 Ornamental Design 746 740 3 Ornamental Design: Ancient 747 740 3 Ornamental Design: Medieval 748 740 3 Ornamental Design: Modern 749 740 3 Collections 750 700 2 Painting 751 750 3 Materials and Methods 752 750 3 Color 753 750 3 Flemish and Dutch Schools 754 750 3 French 755 750 3 Italian 756 750 3 Other Schools 757 750 3 Portrait 758 750 3 Landscape 759 750 3 Collections 760 700 2 Engraving 761 760 3 Wood 762 760 3 Steel and Copper 763 760 3 Lithography 764 760 3 Chromolithography 765 760 3 Line and Stipple 766 760 3 Mezzotint and Aquatint 767 760 3 Etching 768 760 3 Bank Note and Machine 769 760 3 Collections 770 700 2 Photography 771 770 3 Materials 772 770 3 Ambrotype and Daguerreotype 773 770 3 Photograph 774 770 3 Heliotype, Albertype, etc. 775 770 3 Photolithography 776 770 3 Stereoscopic 777 770 3 Portrait 778 770 3 Landscape 779 770 3 Collections 780 700 2 Music 781 780 3 Theory 782 780 3 Dramatic 783 780 3 Church 784 780 3 Vocal 785 780 3 Instrumental 786 780 3 Instrumental: Piano and Organ 787 780 3 Instrumental: Stringed Instruments 788 780 3 Instrumental: Wind Instruments 789 780 3 Associations and Institutions 790 700 2 Amusements 791 790 3 Entertainments 792 790 3 Entertainments: Theatre 793 790 3 In-Door Amusements 794 790 3 In-Door Amusements: Chess 795 790 3 In-Door Amusements: Other Games 796 790 3 Out-Door Sports 797 790 3 Out-Door Sports: Boating and Ball 798 790 3 Out-Door Sports: Horsemanship and Racing 799 790 3 Out-Door Sports: Fishing, Hunting, Shooting 800 NULL 1 Literature 801 800 3 Philosophy 802 800 3 Compends 803 800 3 Dictionaries 804 800 3 Essays 805 800 3 Periodicals 806 800 3 Societies 809 800 3 History 810 800 2 Treatises and Collections 811 810 3 Poetry 812 810 3 Drama 813 810 3 Romance 814 810 3 Essays 815 810 3 Rhetoric and Oratory 816 810 3 Letters 817 810 3 Satire 818 810 3 Humor 819 810 3 Miscellany 820 800 2 English 821 820 3 English Poetry 822 820 3 English Drama 823 820 3 English Romance 824 820 3 English Essays 825 820 3 English Oratory 826 820 3 English Letters 827 820 3 English Satire 828 820 3 English Humor 829 820 3 English Miscellany 830 800 2 German 831 830 3 German Poetry 832 830 3 German Drama 833 830 3 German Romance 834 830 3 German Essays 835 830 3 German Oratory 836 830 3 German Letters 837 830 3 German Satire 838 830 3 German Humor 839 830 3 German Miscellany 840 800 2 French 841 840 3 French Poetry 842 840 3 French Drama 843 840 3 French Romance 844 840 3 French Essays 845 840 3 French Oratory 846 840 3 French Letters 847 840 3 French Satire 848 840 3 French Humor 849 840 3 French Miscellany 850 800 2 Italian 851 850 3 Italian Poetry 852 850 3 Italian Drama 853 850 3 Italian Romance 854 850 3 Italian Essays 855 850 3 Italian Oratory 856 850 3 Italian Letters 857 850 3 Italian Satire 858 850 3 Italian Humor 859 850 3 Italian Miscellany 860 800 2 Spanish 861 860 3 Spanish Poetry 862 860 3 Spanish Drama 863 860 3 Spanish Romance 864 860 3 Spanish Essays 865 860 3 Spanish Oratory 866 860 3 Spanish Letters 867 860 3 Spanish Satire 868 860 3 Spanish Humor 869 860 3 Spanish Miscellany 870 800 2 Latin 871 870 3 Latin Poetry 872 870 3 Latin Poetry: Dramatic 873 870 3 Latin Poetry: Epic 874 870 3 Latin Poetry: Lyric 875 870 3 Latin Oratory 876 870 3 Latin Letters 877 870 3 Latin Satire 878 870 3 Latin Philosophy 879 870 3 Latin History 880 800 2 Greek 881 880 3 Greek Poetry 882 880 3 Greek Poetry: Dramatic 883 880 3 Greek Poetry: Epic 884 880 3 Greek Poetry: Lyric 885 880 3 Greek Oratory 886 880 3 Greek Letters 887 880 3 Greek Humor 888 880 3 Greek Philosophy 889 880 3 Greek History 890 800 2 Other Languages 891 890 3 Chinese 892 890 3 Egyptian 893 890 3 Semitic 894 890 3 Indian 895 890 3 Iranian 896 890 3 Keltic 897 890 3 Slavic 898 890 3 Scandinavian 899 890 3 Other 900 NULL 1 History 901 900 3 Philosophy 902 900 3 Compends, Chronology 903 900 3 Dictionaries 904 900 3 Essays 905 900 3 Periodicals 906 900 3 Societies 907 900 3 Education 908 900 3 Charts 909 900 3 Universal Histories 910 900 2 Geography and Description 911 910 3 Historical 912 910 3 Ancient 913 910 3 Modern 914 910 3 Modern: Europe 915 910 3 Modern: Asia 916 910 3 Modern: Africa 917 910 3 Modern: North America 918 910 3 Modern: South America 919 910 3 Modern: Oceanica and Polar Regions 920 900 2 Biography 921 920 3 Of Philosophy 922 920 3 Of Theology 923 920 3 Of Sociology 924 920 3 Of Philology 925 920 3 Of Science 926 920 3 Of Useful Arts 927 920 3 Of Fine Arts 928 920 3 Of Literature 929 920 3 Genealogy and Heraldry 930 900 2 Ancient History 931 930 3 Chinese 932 930 3 Egyptian 933 930 3 Jewish 934 930 3 Indian 935 930 3 Persian 936 930 3 Keltic 937 930 3 Roman 938 930 3 Greek 939 930 3 Other 940 900 2 Modern Europe 941 940 3 Scotland and Ireland 942 940 3 England 943 940 3 Germany and Austria 944 940 3 France 945 940 3 Italy 946 940 3 Spain and Portugal 947 940 3 Russia 948 940 3 Scandinavia 949 940 3 Other 950 900 2 Modern Asia 951 950 3 China 952 950 3 Japan 953 950 3 Arabia 954 950 3 India 955 950 3 Persia 956 950 3 Turkey in Asia 957 950 3 Siberia 958 950 3 Afghanistan 959 950 3 Other 960 900 2 Modern Africa 96l 960 3 North Africa 962 960 3 North Africa: Egypt and Nubia 963 960 3 North Africa: Abyssinia 964 960 3 North Africa: Morocco 965 960 3 North Africa: Algeria 966 960 3 Central Africa 967 960 3 Central Africa: Guinea 968 960 3 South Africa 969 960 3 Other 970 900 2 Modern North America 971 970 3 British America 972 970 3 British America: Canada 973 970 3 United States and Territories 974 970 3 United States and Territories: Eastern 975 970 3 United States and Territories: Middle 976 970 3 United States and Territories: Southern 977 970 3 United States and Territories: Western 978 970 3 Mexico 979 970 3 Other 980 900 2 Modern South America 981 980 3 Brazil 982 980 3 Argentine Republic 983 980 3 Chili 984 980 3 Bolivia 985 980 3 Peru 986 980 3 New Granada 987 980 3 Venezuela 988 980 3 Guiana 989 980 3 Other 990 900 2 Modern Oceanica and Polar Regions 991 990 3 Malaysia 992 990 3 Malaysia: Sunda 993 990 3 Australasia 994 990 3 Australasia: Australia 995 990 3 Australasia: New Guinea 996 990 3 Polynesia 997 990 3 Isolated Islands 998 990 3 Arctic Regions 999 990 3 Antarctic Regions
Here's the same data in SQL format:
CREATE TABLE categories ( id smallint(3) unsigned zerofill NOT NULL default '000', parent_id smallint(3) unsigned zerofill default NULL, level tinyint(3) unsigned default NULL, name char(48) default NULL, PRIMARY KEY (id), KEY parent_id (parent_id), KEY level (level), KEY name (name) ); INSERT INTO categories VALUES (000,NULL,1,'General'), (010,000,2,'Bibliography'), (011,010,3,'General Bibliographies'), (012,010,3,'Special Forms'), (013,010,3,'Special Forms: Manuscripts'), (014,010,3,'Special Forms: Anonyms, Pseudonyms, etc.'), (015,010,3,'Special Countries'), (016,010,3,'Special Subjects'), (017,010,3,'Subject Catalogues'), (018,010,3,'Authors\' Catalogues'), (019,010,3,'Library Economy and Reports'), (020,000,2,'Book Rarities'), (021,020,3,'Manuscripts'), (022,020,3,'Block Books'), (023,020,3,'Early Printed'), (024,020,3,'Celebrated Printers'), (025,020,3,'Celebrated Binders'), (026,020,3,'Materials'), (027,020,3,'Ownership'), (028,020,3,'Prohibited'), (029,020,3,'Other'), 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