| User Defined ID | True | The biological sample user defined ID is an identifier chosen by the data provider to refer to a sample. This ID may be referenced by other data records (e.g. experiment sample). The user defined ID is not shared. |
| Type | True | The sample types are adopted from Uberon, Cell and CHEBI ontologies. |
| Subtype | False | Enter a sample type that is of finer resolution than the standard sample types provided. If the 'Biological Sample Type' is 'Other', then the sample subtype must be entered. |
| Name | False | The biological sample name is not referenced by other data records. |
| Description | False | The biological sample description is used to describe details of the sample not captured in other columns. |
| Subject ID | True | Please enter either a subject user defined ID or ImmPort accession for the subject from which the sample was derived. A single subject record is permitted. |
| Study ID | True | A biological sample may be linked to a single study. |
| Planned Visit ID | True | The link to a study's planned visit provides temporal context for a sample's derivation from a subject. |
| Treatment ID(s) | False | Please enter either a treatment user defined ID or ImmPort accession if the sample was manipulated in a manner significant to the assay prior to the assay being conducted. One or more identifiers can be entered per sample. Separate identifiers by semicolon (;). |
| Study Time Collected | True | Study time collected describes the time value for when a sample was derived from a subject. |
| Study Time Collected Unit | True | The time units are standard terms recommended by the HIPC Standards group. |
| Study Time T0 Event | True | The time zero event refers to the study milestone upon which time is based. |
| Study Time T0 Event Specify | False | Enter a time zero event if 'Other' is selected in column 'Study Time T0 Event'. |