Semantic resource visits

(February 2026)

# name visits
1 EuroVoc (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 Catalog (CMECS) 305
6 Phytoplankton Traits Thesaurus (PHYTOTRAITS) 134
7 Ontology of Integrated Carbon Observation System (ICOS) (CPMETA) 124
8 Environmental Research Infrastructures Thesaurus (ERITHES) 97
9 ACTRIS Vocabulary (ACTRIS_VOCAB) 80
10 Biomass VRE Thesaurus (BIOMASSVRE) 78
11 Phytoplankton VRE Thesaurus (PHYTOVRE) 76
12 Field of science and technology classification (FOS) 62
13 Biodiversity Thesaurus (BIODIVTHES) 56
14 BioCollections Ontology (BCO) 52
15 Zooplankton Traits Thesaurus (ZOOPLANKTRAITS) 49
16 LifeWatch ERIC Upper Ontology (LUPO) 49
17 Fish Traits Thesaurus (FISHTRAITS) 48
18 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
19 Soil Food Web Ontology (SFWO) 46
20 AGROVOC (AGROVOC) 43
21 The Ecosystem Ontology (ECSO) 41
22 ACTRIS Controlled Lists (ACTRIS_CL) 39
23 Sandy Beach Thesaurus (SBTHES) 38
24 The Interpretation Ontology (INTERPRETATION) 38
25 FuTRES Ontology of Vertebrate Traits (FOVT) 38
26 SnowTerm Thesaurus (SNOWTERM) 36
27 The Extensible Observation Ontology (OBOE) 36
28 The Wildlive Monitoring Ontology (WLMO) 35
29 EuroSciVoc (EUROSCIVOC) 34
30 WISE Classification system (WISE_CLASS) 30
31 The Ecosystem Services Monitoring Ontology (ESMO) 25
32 eurio (EURIO) 23
33 eLTER Controlled Lists (ELTER_CL) 23
34 An ontology of core ecological entities (ECOCORE) 23
35 The Linked Earth Core Ontology (LIPD_ONTOLOGY) 22
36 Alien Species Thesaurus (ALIENSPECIES) 20
37 MarineTLO Ontology (MARINETLO) 19
38 Population and Community Ontology (PCO) 18
39 Annex I habitats for Natura 2000 (N2000_HABITATS) 18
40 EUNIS habitats (EUNIS_HABITATS) 18
41 Invasion Biology Ontology (INBIO) 17
42 Ecotoxicology thesaurus (ECOTOXICTHES) 17
43 Darwin-SW (DSW) 17
44 GeoSpecies Ontology (GEOSP) 16
45 FRBR-aligned Bibliographic Ontology (FABIO) 15
46 Macroalgae Traits Thesaurus (MACROALGAETRAITS) 13
47 Paleoenvironmental Standard Terms (PaST) Thesaurus (PAST) 12
48 FAIR Implementation Profile (FIP) Ontology (FIP_ONTOLOGY) 12
49 Geologic Structures (GEO_STRUCTURES) 11
50 The Paleo Proxy Ontology (PALEO_PROXY) 10
51 Sustainable Meat Systems Ontology (SUMSO) 9
52 Geologic Units (GEOLOGIC_UNITS) 9
53 Darwin Core Pathway Controlled Vocabulary (DWCPW) 9
54 Marine Regions ontology (MR) 8
55 The DMP Common Standard Ontology (DCSO) 8
56 Audubon Core Controlled Vocabulary for Dublin Core format (ACFORMAT) 8
57 Lithology (LITHOLOGY) 7
58 I-ADOPT Framework ontology (I-ADOPT) 7
59 Darwin Core Establishment Means Controlled Vocabulary (DWCEM) 7
60 The Archive Type Ontology (ARCHIVE) 6
61 Audubon Core variant Controlled Vocabulary (ACVARIANT) 6
62 The Paleo Units Ontology (PALEO_UNITS) 5
63 Marine Strategy Framework Directive Vocabulary (MSFDVOCAB) 5
64 Audubon Core subtype Controlled Vocabulary (ACSUBTYPE) 5
65 Social Insect Behavior Ontology (SIBO) 3
66 Porifera Ontology (PORO) 3
67 The Provenance of Emission Calculations Ontology (PECO) 3
68 Ecological Trait-data Standard (ETS) 3
69 Endemisms Thesaurus (ENDEMISMS) 3
70 Darwin Core Degree Of Establishment Controlled Vocabulary (DWCDOE) 3
71 UMLS Semantic Network (STY) 2
72 FAIR Vocabulary (FAIR_VOCABULARY) 2
73 CODATA Research Data Management Terminology (CODATA-RDMT) 2
74 Marine Regions PlaceTypes code list (MRPTCODELIST) 1
75 Biogeographical regions (BIOREGIONS) 1
76 Plant-Pollinator Interactions (PPI) 0
77 The Linked Earth Instrument Ontology (INSTRUMENT) 0