tCMS/www/templates/html/components/attachments.json

{
   "x-tcms-include" : {
      "name" : "attachments",
      "description" : "Assets a post refers to by index, uploaded alongside it."
   },
   "type" : "object",
   "properties" : {
      "attachments" : {
         "type" : "array",
         "items" : { "type" : "upload" },
         "x-tcms-label" : "Attachments"
      }
   }
}