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/3456/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 3456,
    "uuid": "308cd069fdb90c9f7ff790fdec5f2523",
    "title": "Measurements from the Effective Atmospheric Angular Momentum (EAAM) project",
    "abstract": "The Effective Atmospheric Angular Momentum (EAAM) is a combined project from the Met Office and the European Centre for Medium Range Weather Forecasting (ECMWF). The data is of 3 angular momentum components of the mass and wind terms at 12 or 24 hourly intervals. The ECMWF data is from 1979-93 and the Met Office data is from 1983-1997. This dataset is public.\r\n\r\nThere are four historical AAM datasets: \r\n\r\n* AAM (NMC)   - National Meteorological Center \r\n* AAM (JMA)   - Japanese Meteorological Agency\r\n* AAM (UKMO)  - Met Office \r\n* AAM (ECMWF) - European Centre for Medium-Range Weather Forecasting",
    "keywords": "EAAM, angular momentum",
    "discoveryKeywords": [
        1138
    ],
    "publicationState": "published",
    "dataPublishedTime": "2006-12-10T03:04:14",
    "doiPublishedTime": null,
    "member": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/3457/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/13398/?format=api"
    ],
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/2330/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/2331/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/10257/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/12866/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/14782/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/14786/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/14779/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/14780/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/41705/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/51173/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/14781/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/41706/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/14783/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/54779/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/41707/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/51183/?format=api"
    ]
}