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/20462/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 20462,
    "uuid": "df930702332a459ab2203c92a14e36a0",
    "title": "WCRP CMIP5: Met Office Hadley Centre (MOHC) HadGEM2-A model output collection",
    "abstract": "WCRP CMIP5: Met Office Hadley Centre (MOHC) HadGEM2-A model output collection.",
    "keywords": "CMIP5, WCRP, climate change, MOHC, HadGEM2-A, CMIP",
    "discoveryKeywords": [
        1138
    ],
    "publicationState": "published",
    "dataPublishedTime": "2012-09-26T08:25:49",
    "doiPublishedTime": null,
    "member": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/20461/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/20523/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/20526/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/20529/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/20532/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/20534/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/20537/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/20540/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/20543/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/20546/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/20549/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/20552/?format=api"
    ],
    "identifier_set": [],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/79689/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/79682/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/79683/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/79684/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/79685/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/79681/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/79687/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/79688/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/79686/?format=api"
    ]
}