{ 
  "layout":"form",
  "caption": "Extending Controls",
  "onecolumn":true,
  "unbound":true,
  "popup":[800,600],
  "fields": [
    {"control":"date_ddddmmmdyyyy","caption":"date_ddddmmmdyyyy","unbound":true,"default":"5/21/2019"},
    {"control":"h1","value":"Sample Heading"}
  ]
}