In this file, we show a table describing all single-field and multiple-field classification schemes according to the whole set of features we analysed. For the sake of space, we have reduced the size of some columns (Type of scheme, Kind of hierarchy, Related Terms) and shortened their values to a single character. Here follows the association between the single letters and their meaning.
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Type of scheme: L (Term List), T (Taxonomy), U (ThesaUrus), O (Ontology)
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Kind of hierarchy: M (mono), P (poly)
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Related Terms: Y (yes), N (no)
| Knowledge Organization System | Main Discipline | #Concepts | Depth | Sy | Hr | RT |
|---|---|---|---|---|---|---|
| Agrovoc Thesaurus | Agriculture | 41K | 14 | O | P | Y |
| Art and Architecture Thesaurus | Art & Architecture | 58K | 13 | O | P | Y |
| EDAM | Bioinformatics | 264 | 7 | O | P | Y |
| Open Biological and Biomedical Ontology | Biology | 5.3M | 39 | O | P | Y |
| Biomedical Ontologies from BioPortal | Biomedicine | 13M | - | O | P | Y |
| ChemOnt | Chemistry | 4825 | 11 | O | M | Y |
| ACM Computing Classification Scheme | Computer Science | 2114 | 6 | T | P | N |
| Computer Science Ontology | Computer Science | 14K | 13 | O | P | Y |
| Computer Science Subject Headings from Wikipedia | Computer Science | 7354 | 20 | T | M | N |
| Journal of Economic Literature | Economics | 859 | 3 | T | M | N |
| STW Thesaurus for Economics | Economics | 14K | 13 | O | P | Y |
| IEEE Thesaurus | Engineering | 12K | 3 | U | P | Y |
| GeoRef Thesaurus | Geology | 33K | 5 | U | M | Y |
| U.S. Geological Survey Library Classification System | Geology | 2k | 6 | T | M | N |
| Mathematics Subject Classification | Mathematics | 6598 | 3 | T | M | Y |
| Medical Subject Headings | Medicine | 30K | 13 | O | P | Y |
| National Library of Medicine classification | Medicine | 4761 | 4 | T | M | N |
| Unified Medical Language System | Medicine | 3.3M | 30 | U | P | Y |
| PhilPapers Taxonomy | Philosophy | 7447 | 5 | T | P | N |
| Physical Subject Headings | Physics | 3749 | 6 | O | P | Y |
| Physics and Astronomy Classif. Scheme | Physics | 8260 | 5 | T | M | N |
| PsycInfo and PsycTests Classification Systems | Psychology | 188 | 3 | T | M | N |
| TheSoz | Social Science | 8223 | 6 | O | P | Y |
| All Science Journal Classification Codes | Multi-field | 334 | 2 | T | M | N |
| ArXiv Subjects | Multi-field | 176 | 3 | T | M | N |
| Dewey Decimal Classification | Multi-field | 60K | 14 | T | P | Y |
| DFG Classification | Multi-field | 278 | 4 | T | M | N |
| European Commission Taxonomy | Multi-field | 629 | 3 | T | M | N |
| European Research Council Taxonomy | Multi-field | 431 | 3 | T | M | N |
| EuroVoc | Multi-field | 7439 | 6 | O | P | Y |
| Fields of Research (ANZSRC) | Multi-field | 4406 | 3 | T | M | N |
| Fields of research and development (OECD) | Multi-field | 48 | 2 | T | M | N |
| KNOWMAK | Multi-field | 72 | 3 | O | P | Y |
| Library of Congress Class. (and Subj. Head.) | Multi-field | 467K | 29 | O | P | Y |
| Microsoft's Fields of Study | Multi-field | 704K | 6 | T | P | N |
| Modern Science Ontology | Multi-field | 369 | 6 | O | P | N |
| Nature Subjects | Multi-field | 2852 | 8 | O | P | N |
| OpenAIRE's Field of Science Taxonomy | Multi-field | 50K | 6 | T | P | N |
| OpenAlex Topics | Multi-field | 4798 | 4 | T | M | N |
| Research Fields, Courses and Disciplines (ASRC) | Multi-field | 1061 | 3 | T | M | N |
| Science Metrix Classification | Multi-field | 199 | 3 | T | M | N |
| Socio-Economic Objective (ANZSRC) | Multi-field | 1974 | 3 | T | M | N |
| Subject Resource Application Ontology | Multi-field | 435 | 8 | O | P | Y |
| Unesco Thesaurus | Multi-field | 4482 | 6 | O | P | Y |
| Web of Science Categories | Multi-field | 254 | 1 | L | - | N |