> For the complete documentation index, see [llms.txt](https://ess-dive.gitbook.io/sample-id-and-metadata/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ess-dive.gitbook.io/sample-id-and-metadata/term-lists/objecttype.md).

# object type

We have modified the original SESAR IGSN list of [object type terms](https://www.geosamples.org/help/vocabularies#object) for Environmental Systems Science (ESS) samples. Currently, **you must use SESAR terms** to register samples for IGSNs. Please provide feedback on any additional terms needed, modifications to definitions needed, or terms that should be removed.

| **ESS-DIVE Object Type**    | **SESAR IGSN Label**  | **Description**                                                                                                                                                                                                                            |
| --------------------------- | --------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| Core                        | Core                  | A long cylindrical sample, usually of soil or sediment (for Environmental System Science).                                                                                                                                                 |
| Core Section                | Core Section          | Segments of a "core", which can be arbitrarily cut or cut to obtain specific depths.                                                                                                                                                       |
| Cuttings                    | Cuttings              | Loose, coarse, unconsolidated material suspended in drilling fluid.                                                                                                                                                                        |
| Dredge                      | Dredge                | A group of rocks collected by dragging a dredge along the seafloor.                                                                                                                                                                        |
| Experimental Specimen       | Experimental Specimen | A synthetic or natural material used during an experiment.                                                                                                                                                                                 |
| Grab                        | Grab                  | A sample (sometimes mechanically collected) from a deposit or area, not intended to be representative of the deposit or area.                                                                                                              |
| Material Sample             | Individual Sample     | A sample that is an individual unit of material, including soil or sediment samples, biological material, or a bottle of fluid. [A physical result of a sampling (or subsampling) event.](http://rs.tdwg.org/dwc/terms/MaterialSample)     |
| Filtrate                    | NA                    | A sample that has gone through a filtration process to separate solids from fluids (liquids or gases), using a filter medium through which only the fluid can pass. *Must be associated with a filter size.*                               |
| Material Captured in Filter | NA                    | A material sample captured in filter, for example from a water sample that was filtered. Must be associated with filter size field. *Material options include: "particulate matter" or "particulate matter: organic particulate matter" .* |
| Organism                    | NA                    | A whole specimen of a biological organism. [A particular organism or defined group of organisms considered to be taxonomically homogeneous.](http://rs.tdwg.org/dwc/terms/Organism)                                                        |
| Part of organism            | NA                    | A specimen of a portion of a biological organism (e.g. leaf, root, stem).                                                                                                                                                                  |
| Collection of organisms     | NA                    | [A material entity that consists of two or more organisms, viruses, or viroids.](http://purl.obolibrary.org/obo/PCO_0000000)                                                                                                               |
| Site                        | Site                  | A place where a sample is collected.                                                                                                                                                                                                       |