{
  "+json": {
    "compressible": true,
    "notes": "+json means it is JSON, which is compressible."
  },
  "+xml": {
    "compressible": true,
    "notes": "+xml means it is XML, which is compressible."
  },
  "+zip": {
    "compressible": false,
    "notes": "+zip means it is a ZIP archive, which is not compressible."
  }
}