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/13548/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 13548,
    "uuid": "93aecb2607294e25bc4638adc800f8e7",
    "title": "ESA Ocean Colour Climate Change Initiative (Ocean Colour CCI) Dataset Collection",
    "abstract": "Datasets produced by the Ocean Colour project of the ESA Climate Change Inititative (CCI).     The Ocean Colour CCI is producing long-term multi-sensor time-series of satellite ocean-colour data with a particular focus for use in climate studies.\r\n\r\nData products being produced include: phytoplankton chlorophyll-a concentration; remote-sensing reflectance at six wavelengths; total absorption and backscattering coefficients; phytoplankton absorption coefficient and absorption coefficients for dissolved and detrital material; and the diffuse attenuation coefficient for downwelling irradiance for light of  wavelength 490 nm.   Information on uncertainties is also provided.\r\n\r\nThis dataset collection currently holds Version 1.0 data products, and later versions will be added in the future.   Note, version 2.0 data products are now currently available directly from the Ocean Colour CCI team (see link in the documentation section).",
    "keywords": "ESA, Ocean Colour, CCI, ECV",
    "discoveryKeywords": [
        1138
    ],
    "publicationState": "published",
    "dataPublishedTime": null,
    "doiPublishedTime": null,
    "member": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/13333/?format=api",
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        "https://api.catalogue.ceda.ac.uk/api/v2/observations/25381/?format=api"
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    "identifier_set": [],
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}