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A survey of Apple developer documentation.

Framework Symbols Documented
Accelerate
2749 / 3166 (86.8%)
Accounts
74 / 84 (88.1%)
AddressBook
776 / 790 (98.2%)
AddressBookUI
65 / 66 (98.5%)
AdSupport
5 / 5 (100%)
AGL
149 / 153 (97.4%)
AppKit
17218 / 19677 (87.5%)
Apple CryptoKit
643 / 697 (92.3%)
ApplicationServices
1261 / 3683 (34.2%)
ARKit
1034 / 1056 (97.9%)
AssetsLibrary
111 / 112 (99.1%)
AudioToolbox
1398 / 2857 (48.9%)
AuthenticationServices
235 / 243 (96.7%)
Automator
119 / 178 (66.9%)
AVFoundation
6318 / 7163 (88.2%)
AVKit
177 / 242 (73.1%)
BackgroundTasks
35 / 35 (100%)
Bundle Resources
4 / 4 (100%)
Business Chat
21 / 23 (91.3%)
CallKit
167 / 227 (73.6%)
CarPlay
246 / 268 (91.8%)
CFNetwork
427 / 457 (93.4%)
ClassKit
148 / 148 (100%)
ClockKit
320 / 321 (99.7%)
CloudKit
975 / 1194 (81.7%)
CloudKit JS
286 / 287 (99.7%)
Collaboration
33 / 38 (86.8%)
ColorSync
0 / 3 (0.00%)
Combine
7367 / 10930 (67.4%)
Compression
63 / 82 (76.8%)
Contacts
338 / 392 (86.2%)
ContactsUI
41 / 41 (100%)
Core Animation
515 / 584 (88.2%)
Core Audio
124 / 618 (20.1%)
Core Audio Kit
17 / 46 (37.0%)
Core Audio Types
381 / 480 (79.4%)
Core Bluetooth
331 / 333 (99.4%)
Core Data
1376 / 1736 (79.3%)
Core Foundation
2213 / 2459 (90.0%)
Core Graphics
1878 / 2171 (86.5%)
Core Haptics
197 / 198 (99.5%)
Core Image
1268 / 1723 (73.6%)
Core Location
548 / 555 (98.7%)
Core Media
1128 / 2118 (53.3%)
Core MIDI
530 / 710 (74.6%)
Core ML
244 / 266 (91.7%)
Core Motion
217 / 244 (88.9%)
Core NFC
437 / 439 (99.5%)
Core Services
1457 / 4678 (31.1%)
Core Spotlight
263 / 293 (89.8%)
Core Telephony
75 / 80 (93.8%)
Core Text
499 / 745 (67.0%)
Core Video
364 / 456 (79.8%)
Core WLAN
173 / 223 (77.6%)
Create ML
8 / 26 (30.8%)
CryptoTokenKit
233 / 261 (89.3%)
DarwinNotify
21 / 24 (87.5%)
DeviceCheck
16 / 17 (94.1%)
DiskArbitration
59 / 110 (53.6%)
Dispatch
738 / 897 (82.3%)
dnssd
36 / 45 (80.0%)
DriverKit
4 / 9 (44.4%)
EndpointSecurity
1 / 3 (33.3%)
EventKit
528 / 652 (81.0%)
EventKitUI
43 / 48 (89.6%)
ExceptionHandling
30 / 31 (96.8%)
ExecutionPolicy
0 / 19 (0.00%)
ExternalAccessory
72 / 82 (87.8%)
FileProvider
154 / 169 (91.1%)
FileProviderUI
13 / 16 (81.3%)
FinderSync
21 / 30 (70.0%)
ForceFeedback
196 / 286 (68.5%)
Foundation
13650 / 15987 (85.4%)
FWAUserLib
112 / 547 (20.5%)
FxPlug
544 / 617 (88.2%)
Game Controller
155 / 235 (66.0%)
GameKit
793 / 864 (91.8%)
GameplayKit
625 / 664 (94.1%)
GLKit
431 / 490 (88.0%)
GSS
0 / 248 (0.00%)
HealthKit
1011 / 1013 (99.8%)
HealthKitUI
3 / 3 (100%)
HIDDriverKit
0 / 4 (0.00%)
HomeKit
1011 / 1017 (99.4%)
Hypervisor
103 / 408 (25.2%)
iAd
104 / 141 (73.8%)
Image I/O
346 / 756 (45.8%)
InputMethodKit
81 / 108 (75.0%)
Intents
7 / 13 (53.8%)
IntentsUI
3 / 3 (100%)
IOBluetooth
367 / 3894 (9.42%)
IOBluetoothUI
73 / 104 (70.2%)
IOKit
92 / 455 (20.2%)
IOSurface
61 / 147 (41.5%)
IOUSBHost
0 / 123 (0.00%)
iTunesLibrary
255 / 385 (66.2%)
JavaScriptCore
229 / 293 (78.2%)
Kernel
2339 / 28782 (8.13%)
LatentSemanticMapping
59 / 64 (92.2%)
LinkPresentation
33 / 33 (100%)
LivePhotosKit JS
40 / 52 (76.9%)
LocalAuthentication
97 / 97 (100%)
MapKit
1178 / 1209 (97.4%)
MapKit JS
458 / 458 (100%)
Media Player
669 / 682 (98.1%)
MediaAccessibility
43 / 51 (84.3%)
MediaLibrary
163 / 196 (83.2%)
Messages
111 / 111 (100%)
MessageUI
50 / 53 (94.3%)
Metal
3661 / 3684 (99.4%)
Metal Performance Shaders
701 / 2767 (25.3%)
MetalKit
203 / 217 (93.5%)
MetricKit
94 / 99 (94.9%)
Model I/O
581 / 864 (67.2%)
MultipeerConnectivity
93 / 106 (87.7%)
MusicKit JS
232 / 242 (95.9%)
Natural Language
155 / 218 (71.1%)
Network
1331 / 1561 (85.3%)
NetworkExtension
580 / 759 (76.4%)
NetworkingDriverKit
0 / 269 (0.00%)
NewsstandKit
27 / 27 (100%)
NotificationCenter
50 / 54 (92.6%)
Objective-C Runtime
290 / 351 (82.6%)
OpenDirectory
482 / 723 (66.7%)
OpenGL ES
23 / 964 (2.39%)
os
77 / 94 (81.9%)
OSLog
82 / 83 (98.8%)
PassKit (Apple Pay and Wallet)
546 / 572 (95.5%)
PDFKit
460 / 652 (70.6%)
PencilKit
100 / 122 (82.0%)
Photos
4 / 4 (100%)
Playground Support
63 / 95 (66.3%)
PlaygroundBluetooth
72 / 72 (100%)
PreferencePanes
34 / 34 (100%)
PushKit
22 / 23 (95.7%)
Quartz
677 / 752 (90.0%)
QuickLook
60 / 112 (53.6%)
QuickLookThumbnailing
60 / 61 (98.4%)
RealityKit
1144 / 1994 (57.4%)
ReplayKit
89 / 118 (75.4%)
Safari Extensions JS
192 / 208 (92.3%)
SafariServices
130 / 184 (70.7%)
SceneKit
2451 / 2993 (81.9%)
ScreenSaver
19 / 19 (100%)
ScriptingBridge
39 / 40 (97.5%)
Security
3557 / 5194 (68.5%)
SecurityFoundation
9 / 9 (100%)
SecurityInterface
134 / 136 (98.5%)
ServiceManagement
21 / 24 (87.5%)
Sign in with Apple JS
13 / 14 (92.9%)
simd
24 / 3144 (0.763%)
Social
59 / 59 (100%)
SoundAnalysis
47 / 49 (95.9%)
Speech
87 / 88 (98.9%)
SpriteKit
1824 / 2017 (90.4%)
StoreKit
278 / 286 (97.2%)
Swift Package Manager
163 / 195 (83.6%)
Swift Standard Library
10399 / 11595 (89.7%)
SwiftUI
4829 / 11901 (40.6%)
SystemConfiguration
499 / 568 (87.9%)
SystemExtensions
58 / 62 (93.5%)
TVMLKit
274 / 304 (90.1%)
TVMLKit JS
209 / 214 (97.7%)
TVServices
126 / 129 (97.7%)
TVUIKit
75 / 75 (100%)
UIKit
12220 / 13414 (91.1%)
USBDriverKit
0 / 191 (0.00%)
UserNotifications
381 / 393 (96.9%)
UserNotificationsUI
19 / 22 (86.4%)
VideoToolbox
162 / 318 (50.9%)
Vision
601 / 610 (98.5%)
VisionKit
11 / 11 (100%)
vmnet
32 / 51 (62.7%)
WatchConnectivity
77 / 105 (73.3%)
WatchKit
619 / 627 (98.7%)
WebKit
789 / 2171 (36.3%)
WebKit JS
204 / 3941 (5.18%)
XcodeKit
34 / 35 (97.1%)
XCTest
793 / 1180 (67.2%)
XPC
258 / 305 (84.6%)