Hello world

Okyline · 2026-09-16 23:08
StudioFree Java libFree Documentation & AIFree
Okyline symbols reference
@
Required
Field must be present
?
Nullable
Value can be null
{ , }
String Length
Min and max characters
(...)
Value Constraint
Number ranges or enums
~ ~
Format
Regex or built-in format
[ , ]
Array Size
Min and max elements
#
Key Field
Unique identifier
!
Uniqueness
No duplicate objects
→
Item Constraint
For array elements
1{
2 "$title": "Hello world",
3 "$oky": {
4 "message|@": "Hello world",
5 "author|@ {2,30}": "Ada",
6 "views|(>=0)": 12,
7 "published": true,
8 "publicationDate|~$Date~": "2026-07-30"
9 }
10}