> For the complete documentation index, see [llms.txt](https://docs.opencga.opencb.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.opencga.opencb.org/develop-2/data-models/cohort.md).

# Cohort

## Overview

Cohort data model hosts information about any cohort.

### Summary

| Field            |                                         Create                                        |                                         Update                                        |                                         Unique                                        |                                        Required                                       |
| ---------------- | :-----------------------------------------------------------------------------------: | :-----------------------------------------------------------------------------------: | :-----------------------------------------------------------------------------------: | :-----------------------------------------------------------------------------------: |
| id               | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) |
| uuid             |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |
| type             | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |
| creationDate     | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |
| modificationDate | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |
| description      | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |
| samples          | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |
| numSamples       | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |
| release          | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |
| status           | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |
| internal         | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |
| attributes       | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) | ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/yes.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |  ![](https://github.com/opencb/opencga/blob/develop/docs/data-models/no.png?raw=true) |

## Data Model

### Cohort

You can find the Java code [here](https://github.com/opencb/opencga/tree/TASK-1587/opencga-core/src/main/java/org/opencb/opencga/core/models/cohort/Cohort.java).

| Field                                                                                                                                           | Description                                                                                                                                               |
| ----------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- |
| <p><strong>id</strong><br><em>String</em><br></p>                                                                                               | Object ID is a mandatory parameter when creating a new one, this ID cannot be changed at the moment.                                                      |
| <p><strong>uuid</strong><br><em>String</em><br></p>                                                                                             | Unique 32-character identifier assigned automatically by OpenCGA.                                                                                         |
| <p><strong>type</strong><br><em>CohortType</em><br></p>                                                                                         | Cohort type that can have the values CASE\_CONTROL, CASE\_SET, CONTROL\_SET, PAIRED, PAIRED\_TUMOR, AGGREGATE, TIME\_SERIES, FAMILY, TRIO and COLLECTION. |
| <p><strong>creationDate</strong><br><em>String</em><br></p>                                                                                     | Autogenerated date following the format YYYYMMDDhhmmss containing the date when the entry was first registered.                                           |
| <p><strong>modificationDate</strong><br><em>String</em><br><br><em>since</em>: 1.0</p>                                                          | Autogenerated date following the format YYYYMMDDhhmmss containing the date when the entry was last modified.                                              |
| <p><strong>description</strong><br><em>String</em><br></p>                                                                                      | Users may provide a description for the entry.                                                                                                            |
| <p><strong>samples</strong><br><em>List<</em><a href="https://docs.opencga.opencb.org/data-models/sample"><em>Sample</em></a><em>></em><br></p> | List of cohort samples.                                                                                                                                   |
| <p><strong>numSamples</strong><br><em>int</em><br></p>                                                                                          | Number of samples.                                                                                                                                        |
| <p><strong>release</strong><br><em>int</em><br></p>                                                                                             | An integer describing the current data release.                                                                                                           |
| <p><strong>status</strong><br><a href="https://docs.opencga.opencb.org/data-models/cohort#status"><em>Status</em></a><br></p>                   | Object to set a custom status.                                                                                                                            |
| <p><strong>internal</strong><br><a href="https://docs.opencga.opencb.org/data-models/cohort#cohortinternal"><em>CohortInternal</em></a><br></p> | Internal field for manage the object.                                                                                                                     |
| <p><strong>attributes</strong><br><em>Map\<String,Object></em><br></p>                                                                          | You can use this field to store any other information, keep in mind this is not indexed so you cannot search by attributes.                               |

### CohortInternal

You can find the Java code [here](https://github.com/opencb/opencga/tree/TASK-1587/opencga-core/src/main/java/org/opencb/opencga/core/models/cohort/CohortInternal.java).

| Field                                                                                                                                         | Description                                           |
| --------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------- |
| <p><strong>status</strong><br><a href="https://docs.opencga.opencb.org/data-models/cohort#internalstatus"><em>InternalStatus</em></a><br></p> | Status of the internal object.                        |
| <p><strong>registrationDate</strong><br><em>String</em><br></p>                                                                               | Registration date of the internal object.             |
| <p><strong>lastModified</strong><br><em>String</em><br></p>                                                                                   | Date of the last modification of the internal object. |

### Status

You can find the Java code [here](https://github.com/opencb/biodata/tree/develop/biodata-models/src/main/java/org/opencb/biodata/models/common/Status.java).

### InternalStatus

You can find the Java code [here](https://github.com/opencb/opencga/tree/TASK-1587/opencga-core/src/main/java/org/opencb/opencga/core/models/common/InternalStatus.java).


---

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