{
 "id": "nib-file-format",
 "name": "NIB File Format",
 "category": "markup",
 "identifiers": {
  "extensions": [
   "nib"
  ],
  "puid": [
   "fmt/983"
  ],
  "wikidata": [
   "Q50375236"
  ],
  "magic": [
   {
    "offset": 0,
    "hex": "3c3f786d6c2076657273696f6e3d",
    "notes": "NIB File Format"
   },
   {
    "offset": 0,
    "hex": "3c3f786d6c2076657273696f6e3d22312e302220656e636f64696e673d225554462d38223f3e0a3c21444f435459504520706c69737420"
   }
  ],
  "signatures": [
   {
    "name": "NIB File Format",
    "sequences": [
     {
      "position": "bof",
      "offset": 0,
      "pattern": "3c3f786d6c2076657273696f6e3d(22|27)312e30(22|27){8-256}3c706c6973742076657273696f6e3d22312e30223e"
     },
     {
      "position": "eof",
      "offset": 8,
      "max_offset": 256,
      "pattern": "494253797374656d2056657273696f6e"
     }
    ]
   }
  ],
  "priority_over": [
   "fmt/101",
   "fmt/979"
  ]
 },
 "status": "unknown",
 "summary": "The NIB file format is used by Interface Builder, a software development application for Apple's Mac OS X operating system. The NIB objects are stored as an XML property list, they are unpackaged upon running an application.",
 "tools": [
  {
   "name": "Interface Builder",
   "url": "https://developer.apple.com/xcode/interface-builder",
   "reads": true,
   "writes": true
  }
 ],
 "projects": [
  {
   "name": "PRONOM fmt/983",
   "url": "https://www.nationalarchives.gov.uk/PRONOM/fmt/983",
   "kind": "format-doc"
  },
  {
   "name": "Wikidata Q50375236",
   "url": "https://www.wikidata.org/wiki/Q50375236",
   "kind": "wiki"
  }
 ],
 "provenance": {
  "sources": [
   "pronom",
   "wikidata"
  ]
 },
 "updated": "2026-10-20",
 "aliases": [],
 "structure": [],
 "parsers": [],
 "conversions": [],
 "samples": [],
 "claims": [],
 "verification": []
}