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/23421/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 23421,
    "uuid": "942323240cf347d680e4c11d8641391c",
    "title": "WCRP CMIP5: College of Global Change and Earth System Science (GCESS) BNU-ESM model output collection",
    "abstract": "WCRP CMIP5: College of Global Change and Earth System Science (GCESS) BNU-ESM model output collection.",
    "keywords": "CMIP5, WCRP, climate change, BNU, BNU-ESM, CMIP",
    "discoveryKeywords": [
        1138
    ],
    "publicationState": "published",
    "dataPublishedTime": "2017-03-17T13:58:11.311084",
    "doiPublishedTime": null,
    "member": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/23420/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/23424/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/23427/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/23430/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/23433/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/23436/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/23439/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/23442/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/23445/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/23448/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/23451/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/23454/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/23457/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/23460/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/23463/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/23466/?format=api"
    ],
    "identifier_set": [],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/94979/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/94972/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/94973/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/94974/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/94975/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/94971/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/94977/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/94978/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/94976/?format=api"
    ]
}