Get a list of Collections objects. Collections have a 1:1 mapping with Observations.

### Available end points:

- `/observationcollections/` - Will list all Collections in the database
- `/observationcollections.json` - Will return all Collections in json format
- `/observationcollections/<object_id>/` - Returns Collections object with that id

### Available Methods:

- `GET`
- `HEAD`

### Available filters:

- `uuid`
- `title`
- `keywords`
- `discoveryKeywords`
- `publicationState`

### How to use filters:

- `/observationcollections/?uuid=ab4ca8d019d148f78afba1cd20872bdd`

- `/observationcollections.json?publicationState=citable`

GET /api/v2/observationcollections/34215/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 34215,
    "uuid": "ca442697b5f5457a80c0c232b4f6733c",
    "title": "WCRP CMIP6: National Center for Atmospheric Research (NCAR) CESM1-CAM5-SE-LR model output collection",
    "abstract": "World Climate Research Programme (WCRP) Coupled Model Intercomparison Project Phase 6 (CMIP6): Collection of simulations from the National Center for Atmospheric Research (NCAR) CESM1-CAM5-SE-LR model.\n\nThe official CMIP6 Citation, and its associated DOI, is provided as an online resource linked to this record.",
    "keywords": "CMIP6, WCRP, climate change, NCAR, CESM1-CAM5-SE-LR",
    "discoveryKeywords": [
        1138
    ],
    "publicationState": "published",
    "dataPublishedTime": null,
    "doiPublishedTime": null,
    "member": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/34213/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/34217/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/34220/?format=api"
    ],
    "identifier_set": [],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/158228/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/158221/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/158222/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/158223/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/158224/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/158225/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/158220/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/158227/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/158226/?format=api"
    ]
}