Global services and element URIs

The client must retrieve the login URI, as most services and element URIs require the client to be properly authenticated.

The version-specific URI declares the URIs for all elements and root services in a list named entry_point. The login URI is named login:

GET http://localhost:8082/7.2.1/api
Status Code: 200 OK
{
    "entry_point": [
        {
            "href": "http://localhost:8082/7.2.1/elements",
            "rel": "elements"
        },
…
        {
            "href": "http://localhost:8082/7.2.1/elements/host",
            "rel": "host"
        },
…
        {
            "href": "http://localhost:8082/7.2.1/login",
            "rel": "login 
        }
    ]
}