Expressing a nested menu in Cj

menu.js

{ "collection" : {

  "version" : "1.0",
  "href" : "http://example.org/nav",

  "links" : [
    {"link" : {"rel" : "profile", "href": "http://example.org/profiles/nav"}
  ],
  
  "items" : [
    { "href" : "http://example.org/nav/file", 
      "data" : [
        {"name" : "title", "value" : "File"},
        {"name" : "shortcut", "value" : "alt+f"},
      ]
    },
    { "href" : "http://example.org/nav/new", 
      "data" : [
        {"name" : "title", "value" : "New"},
        {"name" : "shortcut", "value" : "ctrl+n"},
        {"name" : "parent", "value" : "http://example.org/nav/file"},
      ]
    },
    { "href" : "http://example.org/nav/open", 
      "data" : [
        {"name" : "title", "value" : "Open..."},
        {"name" : "shortcut", "value" : "ctrl+o"},
        {"name" : "parent", "value" : "http://example.org/nav/file"},
      ]
    },
    { "href" : "http://example.org/nav/save", 
      "data" : [
        {"name" : "title", "value" : "Save"},
        {"name" : "shortcut", "value" : "ctrl+s"},
        {"name" : "parent", "value" : "http://example.org/nav/file"},
      ]
    },
    { "href" : "http://example.org/nav/saveas", 
      "data" : [
        {"name" : "title", "value" : "Save As..."},
        {"name" : "shortcut", "value" : "a"},
        {"name" : "parent", "value" : "http://example.org/nav/file"},
      ]
    },
    { "href" : "http://example.org/nav/print", 
      "data" : [
        {"name" : "title", "value" : "Print..."},
        {"name" : "shortcut", "value" : "ctrl+p"},
        {"name" : "parent", "value" : "http://example.org/nav/file"},
      ]
    },
    { "href" : "http://example.org/nav/edit", 
      "data" : [
        {"name" : "title", "value" : "edit"},
        {"name" : "shortcut", "value" : "alt+e"},
      ]
    },
    { "href" : "http://example.org/nav/undo", 
      "data" : [
        {"name" : "title", "value" : "Undo"},
        {"name" : "shortcut", "value" : "ctrl+z"},
        {"name" : "parent", "value" : "http://example.org/nav/edit"},
      ]
    },
    { "href" : "http://example.org/nav/find", 
      "data" : [
        {"name" : "title", "value" : "Find"},
        {"name" : "shortcut", "value" : "ctrl+f"},
        {"name" : "parent", "value" : "http://example.org/nav/edit"},
      ]
    },
    { "href" : "http://example.org/nav/selectall", 
      "data" : [
        {"name" : "title", "value" : "Select All"},
        {"name" : "shortcut", "value" : "ctrl+a"},
        {"name" : "parent", "value" : "http://example.org/nav/edit"},
      ]
    }
  ]
  
  }
}