Semantic resource visits

(February 2026)

# name visits
1 EuroVoc Core Concepts (EUROVOC) 1,057
2 Chemical Functional Ontology (CHEMFONT) 892
3 Traits Thesaurus (TRAITS_THES) 429
4 Environmental Thesaurus (ENVTHES) 333
5 Coastal and Marine Ecological Classification Standard (CMECS) 305
6 Phytoplankton Traits Thesaurus (PHYTOTRAITS) 134
7 Ontology of Integrated Carbon Observation System (ICOS) (CPMETA) 124
8 ACTRIS Vocabulary (ACTRIS_VOCAB) 80
9 Phytoplankton VRE Thesaurus (PHYTOVRE) 76
10 Field of science and technology classification (FOS) 62
11 Biodiversity Thesaurus (BIODIVTHES) 56
12 BioCollections Ontology (BCO) 52
13 Zooplankton Traits Thesaurus (ZOOPLANKTRAITS) 49
14 LifeWatch ERIC Upper Ontology (LUPO) 49
15 Fish Traits Thesaurus (FISHTRAITS) 48
16 ISO 639-2: Codes for the Representation of Names of Languages - Part 2: Alpha-3 Code for the Names of Languages (ISO_639-2) 47
17 Soil Food Web Ontology (SFWO) 46
18 AGROVOC (AGROVOC) 43
19 The Ecosystem Ontology (ECSO) 41
20 ACTRIS Controlled Lists (ACTRIS_CL) 39
21 The Interpretation Ontology (INTERPRETATION) 38
22 FuTRES Ontology of Vertebrate Traits (FOVT) 38
23 SnowTerm (SNOWTERM) 36
24 The Extensible Observation Ontology (OBOE) 36
25 EuroSciVoc (EUROSCIVOC) 34
26 WISE Classification system (WISE_CLASS) 30
27 eurio (EURIO) 23
28 eLTER Controlled Lists (ELTER_CL) 23
29 The Linked Earth Core Ontology (LIPD_ONTOLOGY) 22
30 Alien Species Thesaurus (ALIENSPECIES) 20
31 MarineTLO Ontology (MARINETLO) 19
32 Population and Community Ontology (PCO) 18
33 EUNIS habitats (EUNIS_HABITATS) 18
34 Invasion Biology Ontology (INBIO) 17
35 Darwin-SW (DSW) 17
36 FRBR-aligned Bibliographic Ontology (FABIO) 15
37 test (TEST) 14
38 Macroalgae Traits Thesaurus (MACROALGAETRAITS) 13
39 FAIR Implementation Profile (FIP) Ontology (FIP_ONTOLOGY) 12
40 Geologic Structures (GEO_STRUCTURES) 11
41 The Paleo Proxy Ontology (PALEO_PROXY) 10
42 Geologic Units (GEOLOGIC_UNITS) 9
43 Darwin Core Pathway Controlled Vocabulary (DWCPW) 9
44 Marine Regions ontology (MR) 8
45 The DMP Common Standard Ontology (DCSO) 8
46 Audubon Core Controlled Vocabulary for Dublin Core format (ACFORMAT) 8
47 test2 (TEST2) 7
48 Lithology (LITHOLOGY) 7
49 I-ADOPT Framework ontology (I-ADOPT) 7
50 Darwin Core Establishment Means Controlled Vocabulary (DWCEM) 7
51 The Archive Type Ontology (ARCHIVE) 6
52 Audubon Core variant Controlled Vocabulary (ACVARIANT) 6
53 SCAR Gazetteer of Antarctica (SCAR_CGA) 5
54 The Paleo Units Ontology (PALEO_UNITS) 5
55 Audubon Core subtype Controlled Vocabulary (ACSUBTYPE) 5
56 Ecological Trait-data Standard (ETS) 3
57 Endemisms Thesaurus (ENDEMISMS) 3
58 Darwin Core Degree Of Establishment Controlled Vocabulary (DWCDOE) 3
59 test5 (TEST5) 2
60 test4 (TEST4) 2
61 TEST3 (TEST3) 2
62 UMLS Semantic Network (STY) 2
63 FAIR Vocabulary (FAIR_VOCABULARY) 2
64 CODATA Research Data Management Terminology (CODATA-RDMT) 2
65 Service Types (ST) 1
66 Annex I habitats for Natura 2000 (N2000HABITATS) 1
67 Marine Regions PlaceTypes code list (MRPTCODELIST) 1
68 BiomassVRE (BIOVRE) 1
69 Biogeographical regions (BIOREGIONS) 1
70 The Paleo Variables Ontology (PALEO_VARIABLES) 0
71 The Linked Earth Instrument Ontology (INSTRUMENT) 0
72 ESA Data Ontology (ESADO) 0
73 EARTh - Environmental Applications Reference Thesaurus (EARTH) 0