read-only extension for items -- add the "read-only" property to the item element.

read-only-items.js

{ "collection" :
  {
    "version" : "1.0",
    "href" : "http://api.example.com/users",
    
    "links" : [
    ],
    
    "items" : [
      {
        "href" : "http://api.example.com/users/1",
        "read-only" : true,
        "data" : [
          {"name" : "givenName", "value" : "mike"},
          {"name" : "familyName", "value" : "amundsen"},
          {"name" : "email", "value" : "mca@mexample.com"},
          {"name" : "voicePhone", "value" : "123.456.7890"},
          {"name" : "nickName", "value" : "mamund"}
        ]
      },
      {
        "href" : "http://api.example.com/users/2",
        "data" : [
          {"name" : "givenName", "value" : "mandy"},
          {"name" : "familyName", "value" : "mirrison"},
          {"name" : "email", "value" : "mandy@example.com"},
          {"name" : "voicePhone", "value" : "234.567.8901"},
          {"name" : "nickName", "value" : "mandymo"}
        ],
        "links" : [
          {"rel" : "edit", "href" : "http://api.example.com/users/2;edit"}
        ]
      }
    ],
    
    "template" : {
      "data" : [
        {"name" : "givenName", "value" : ""},
        {"name" : "familyName", "value" : ""},
        {"name" : "email", "value" : ""},
        {"name" : "voicePhone", "value" : ""},
        {"name" : "nickName", "value" : ""},
        {"name" : "password", "value" : ""}
      ]
     }
  }
}