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/15864/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 15864,
    "uuid": "1ece634706f14b02a7a0c67a2336cba9",
    "title": "AQUM: in-situ airborne observations by the FAAM BAE-146 aircraft",
    "abstract": "In-situ airborne observations by the FAAM BAE-146 aircraft for AQUM - Air Quality forecasting and modelling in the Unified Model project, general Met Office flying.",
    "keywords": "AQUM, BORTAS, FAAM, airborne, atmospheric measurments",
    "discoveryKeywords": [
        1138
    ],
    "publicationState": "published",
    "dataPublishedTime": "2014-07-14T13:38:13",
    "doiPublishedTime": null,
    "member": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/15863/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/16483/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/18055/?format=api"
    ],
    "identifier_set": [],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/61150/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/61142/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/61143/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/61149/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/61141/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/61146/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/61147/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/61148/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/61144/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/61145/?format=api"
    ]
}