| parameter | rdf type purl label | rdf type purl | pm:searchable | units label | units purl | measurement source purl label | measurement source purl | pm:measurement source protocol | pm:source url | frictionless type | frictionless format |
| SampleID_Tara | centrally registered identifier | http://purl.obolibrary.org/obo/IAO_0000578 | FALSE | | | | | | https://www.ncbi.nlm.nih.gov/bioproject/213098 | string | |
| BioSample | Biosample identifier assigned by the National Center for Biotechnology
Information | http://purl.obolibrary.org/obo/PMO_00000122 | FALSE | | | | | | https://www.ncbi.nlm.nih.gov/bioproject/213098 | string | |
| Chlorophyll Sensor | concentration of chlorophyll in water | http://purl.obolibrary.org/obo/ENVO_3100036 | TRUE | miligram per cubic meter | http://purl.obolibrary.org/obo/PMO_00000132 | https://www.ncbi.nlm.nih.gov/bioproject/213098 | number | | | | |
| Depth | depth of water | http://purl.obolibrary.org/obo/ENVO_3100031 | TRUE | meter | http://purl.obolibrary.org/obo/UO_0000008 | https://www.ncbi.nlm.nih.gov/bioproject/213098 | number | | | | |
| Description | comment on investigation | http://purl.obolibrary.org/obo/OBI_0001898 | FALSE | | | | | | https://www.ncbi.nlm.nih.gov/bioproject/213098 | string | |
| Event Date/Time End | specimen collection time measurement datum stop | http://purl.obolibrary.org/obo/PMO_00000009 | TRUE | time unit | http://purl.obolibrary.org/obo/UO_0000003 | https://www.ncbi.nlm.nih.gov/bioproject/213098 | datetime | %Y-%m-%dT%H:%M | | | |
| Event Date/Time Start | specimen collection time measurement datum start | http://purl.obolibrary.org/obo/PMO_00000008 | TRUE | time unit | http://purl.obolibrary.org/obo/UO_0000003 | https://www.ncbi.nlm.nih.gov/bioproject/213098 | datetime | %Y-%m-%dT%H:%M | | | |
| Event Label | centrally registered specimen collection event identifier | http://purl.obolibrary.org/obo/PMO_00000056 | FALSE | | | | | | https://www.ncbi.nlm.nih.gov/bioproject/213098 | string | |
| Latitude End | latitude coordinate measurement datum stop | http://purl.obolibrary.org/obo/PMO_00000079 | TRUE | degree | http://purl.obolibrary.org/obo/UO_0000185 | https://www.ncbi.nlm.nih.gov/bioproject/213098 | number | | | | |
| Latitude Start | latitude coordinate measurement datum start | http://purl.obolibrary.org/obo/PMO_00000076 | TRUE | degree | http://purl.obolibrary.org/obo/UO_0000185 | https://www.ncbi.nlm.nih.gov/bioproject/213098 | number | | | | |
| Longitude End | longitude coordinate measurement datum stop | http://purl.obolibrary.org/obo/PMO_00000078 | TRUE | degree | http://purl.obolibrary.org/obo/UO_0000185 | https://www.ncbi.nlm.nih.gov/bioproject/213098 | number | | | | |
| Longitude Start | longitude coordinate measurement datum start | http://purl.obolibrary.org/obo/PMO_00000077 | TRUE | degree | http://purl.obolibrary.org/obo/UO_0000185 | https://www.ncbi.nlm.nih.gov/bioproject/213098 | number | | | | |
| Nitrate Sensor | concentration of nitrate in water | http://purl.obolibrary.org/obo/ENVO_3100022 | TRUE | micromole per litre | http://purl.obolibrary.org/obo/UO_0010003 | https://www.ncbi.nlm.nih.gov/bioproject/213098 | number | | | | |
| Oxygen Sensor | concentration of oxygen in water | http://purl.obolibrary.org/obo/ENVO_09200021 | TRUE | micromole per kilogram | http://purl.obolibrary.org/obo/UO_0010004 | https://www.ncbi.nlm.nih.gov/bioproject/213098 | number | | | | |
| Salinity Sensor | liquid water salinity | http://purl.obolibrary.org/obo/PMO_00000014 | TRUE | practical salinity unit | http://purl.obolibrary.org/obo/PMO_00000037 | https://www.ncbi.nlm.nih.gov/bioproject/213098 | number | | | | |
| Size Fraction Lower Threshold | aquatic sample minimum filter fractionation size threshold | http://purl.obolibrary.org/obo/PMO_00000022 | TRUE | micrometer | http://purl.obolibrary.org/obo/UO_0000017 | https://www.ncbi.nlm.nih.gov/bioproject/213098 | number | | | | |
| Size Fraction Upper Threshold | aquatic sample maximum filter fractionation size threshold | http://purl.obolibrary.org/obo/PMO_00000023 | TRUE | micrometer | http://purl.obolibrary.org/obo/UO_0000017 | https://www.ncbi.nlm.nih.gov/bioproject/213098 | number | | | | |
| Temperature | temperature of water | http://purl.obolibrary.org/obo/ENVO_09200014 | TRUE | degree Celsius | http://purl.obolibrary.org/obo/UO_0000027 | https://www.ncbi.nlm.nih.gov/bioproject/213098 | number | | | | |
| purl_biome | biome | http://purl.obolibrary.org/obo/ENVO_00000428 | TRUE | | | | | | | | |
| purl_feature | environmental feature | http://purl.obolibrary.org/obo/ENVO_00002297 | TRUE | | | | | | | | |
| purl_material | environmental material | http://purl.obolibrary.org/obo/ENVO_00010483 | TRUE | | | | | | | | |