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/21438/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 21438,
    "uuid": "de2e30c90eb7449c8cbcf9b45c7a1192",
    "title": "WCRP CMIP5: Canadian Centre for Climate Modelling and Analysis (CCCma) CanAM4 model output collection",
    "abstract": "WCRP CMIP5: Canadian Centre for Climate Modelling and Analysis (CCCma) CanAM4 model output collection.",
    "keywords": "CMIP5, WCRP, climate change, CCCma, CanAM4, CMIP",
    "discoveryKeywords": [
        1138
    ],
    "publicationState": "published",
    "dataPublishedTime": "2017-03-17T13:57:26.808235",
    "doiPublishedTime": null,
    "member": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/21437/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/21441/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/21444/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/21447/?format=api"
    ],
    "identifier_set": [],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/84567/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/84560/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/84561/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/84562/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/84563/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/84559/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/84565/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/84566/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/84564/?format=api"
    ]
}