JSON Siren vs. HAL Representations

hal.json

{
  "_links": {
    "self": { "href": "/orders" },
    "next": { "href": "/orders?page=2" },
    "find": { "href": "/orders{?id}", "templated": true }
  },
  "_embedded": {
    "orders": [{
        "_links": {
          "self": { "href": "/orders/123" },
          "basket": { "href": "/baskets/98712" },
          "customer": { "href": "/customers/7809" }
        },
        "total": 30.00,
        "currency": "USD",
        "status": "shipped",
      },{
        "_links": {
          "self": { "href": "/orders/124" },
          "basket": { "href": "/baskets/97213" },
          "customer": { "href": "/customers/12369" }
        },
        "total": 20.00,
        "currency": "USD",
        "status": "processing"
    }]
  },
  "currentlyProcessing": 14,
  "shippedToday": 20
}

siren.json

{
  "class": "orders",
  "properties": {
    "currentlyProcessing": 14,
    "shippedToday": 20
  },
  "entities": [
    {
      "class": "order list-item",
      "rel": "order",
      "properties": {
        "total": 30.00,
        "currency": "USD",
        "status": "shipped"
      },
      "entities": [
        { "rel": "basket", "href": "/baskets/98712" },
        { "rel": "customer", "href": "/customers/7809" }
      ],
      "links": [{ "rel": "self", "href": "/orders/123" }]
    },
    {
      "class": "order list-item",
      "rel": "order",
      "properties": {
        "total": 20.00,
        "currency": "USD",
        "status": "processing"
      },
      "entities": [
        { "rel": "basket", "href": "/baskets/98713" },
        { "rel": "customer", "href": "/customers/12369" }
      ],
      "links": [{ "rel": "self", "href": "/orders/124" }]
    }
  ],
  "actions": [{
      "class": "find-order",
      "href": "/orders",
      "fields": [{ "name": "id", "type": "number" }]
  }],
  "links": [
    { "rel": "self", "href": "/orders" },
    { "rel": "next", "href": "/orders?page=2" }
  ]
}

In my opinion HAL is the most straightforward... well apart from the _embeded concept which can become cumbersome sometimes. So I like HAL - _embeded !

The SIREN representation doesn't seem equivalent to the HAL one. The HAL representation has an embedded representation called "orders" which is an array of orders. The SIREN representation has two embedded resources, unfortunately unnamed, which are order list-item.

Anyone know which json standard has become most popular? I'm writing a bunch of json schema for various multimedia apps but standardization among units is lacking. Will probably go with something closer to Siren.

You may find this useful and/or interesting: http://json-schema.org/latest/json-schema-core.html