simpler?

GET /wls_configs/machines
{
    "_links": [
        {
            "title": "machines",
            "rel": "self",
            "uri": "/wls_configs/machines"
        },
        {
            "title": "DEV99m1",
            "rel": "component",
            "uri": "/wls_configs/machines/DEV99m1/components"
        },
        {
            "title": "DEV14m1",
            "rel": "component",
            "uri": "/wls_configs/machines/DEV14m1/components"
        }
    ]
}

GET /wls_configs/machines/DEV14m1/components
{
    "_links": [
        {    
            "title": "DEV14m1 components",
            "rel",: "self",
            "uri": "/wls_configs/DEV14m1/components"
        },
        {
            "title": "host",
            "rel": "datetime",
            "uri": "/wls_configs/machines/DEV14m1/components/host/datetimes"
        },
        {
            "title": "bip",
            "rel": "datetime",
            "uri": "/wls_configs/machines/DEV14m1/components/bip/datetimes"
        }
    ]
}

GET /wls_configs/machines/DEV14m1/components/host/datetimes
{
    "_links": [
        {
            "title": "DEV14m1 host datetimes",
            "rel": "self",
            "uri": "/wls_configs/machines/DEV14m1/components/host/datetimes"
        },
        {
            "title": "20150715",
            "rel": "config",
            "uri": "/wls_configs/machines/DEV14m1/components/host/datetimes/20150715"
        },
        {
            "title": "20150728",
            "rel": "config",
            "uri": "/wls_configs/machines/DEV14m1/components/host/datetimes/20150728"
        }
    ]
}