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/32072/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 32072,
    "uuid": "a5c833831e26474bb1100ad3aa58bdf9",
    "title": "ESA Water Vapour Climate Change Initiative (Water_Vapour_cci):   Total Column Water Vapour over land (CDR1), v3.1",
    "abstract": "This collection of data comprises the European Space Agency (ESA) Water Vapour Climate Change Initiative (Water Vapour_cci) Total Column Water Vapour over land, Climate Data Record 1 (TCWV-land (CDR1)).   It comprises four datasets providing daily and monthly averages at 0.5 and 0.05 degree resolution respectively.",
    "keywords": "total column, water vapour, cci",
    "discoveryKeywords": [
        1138
    ],
    "publicationState": "published",
    "dataPublishedTime": "2021-12-21T09:48:42",
    "doiPublishedTime": null,
    "member": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/32068/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/32069/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/32070/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/32071/?format=api"
    ],
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/10973/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/149516/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/142257/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/142256/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/142254/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/142253/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/142252/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/149510/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/142255/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/149511/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/149512/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/149513/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/149514/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/149517/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/149515/?format=api"
    ]
}