All numbers in Decimal
Each line begins with the number of bytes that the information of that line requires, unless the line contains an insertion or a bit description, as explained below.
Unless otherwise specified (e.g., "(double)"), the information is an integer
A { and its paired } indicate insertions:
> Any Length followed by { <something> } indicates a string insertion
> Any value followed by a { on the next line indicates that the information between that { and its paired } is repeated the amount of times specified by that value.
A >> denotes that a byte is broken up into bits, and the following lines describe those bits, each preceded by a > and a bit count (denoted by a "b" - e.g. "1b" indicates 1 bit)

*1* Argument Types:
  0 Expression
  1 String
  2 Both
  3 Boolean
  4 Menu
  D Color
  F Font String
  5 Sprite
  6 Sound
  7 Background
  8 Path
  9 Script
  A Object
  B Room
  C Font
  E Timeline

*2* Execution Information is an adapted value that depends on Execution Type.
  0 Normal - Execution Information remains empty (0)
	1 Function - Execution Information contains Function Name
	2 Code - Execution Information contains Code

-----------------------------------------------------------------------------

3 (string) "LGL"
2 LGM version needed for the following info (160)
3 Lib ID (if ID < 1000, this file is protected as official)
1 Length of Tab Caption { Tab Caption }
1 Length of Author { Author }
4 Lib Version
8 (double) Last Changed date
4 Length of Info { Info }
4 Length of Initialization Code { Initialization Code }
1 >>
> 1b Advanced
> 7b Number of Actions
{
 2 LGM version needed for the following info (160)
 2 Action Id
 1 Length of Name { Name }
 4 Image size { compressed image data }
 1 Length of Description { Description }
 1 Length of List Text { List Text }
 1 Length of Hint Text { Hint Text }
 1 >>
 > 1b Hidden
 > 1b Advanced
 > 1b Registered only
 > 1b Question
 > 1b Apply to
 > 1b Relative
 > 2b Execution Type (0-2) *2*
 4 Length of Execution Information { Execution Information } *2*
 1 >>
 > 4b Kind (0-10)
 > 4b Interface Kind (0=Normal, 1=None, 2=Arrows, 5=Code, 6=Text)
 1 Argument Count
 {
  1 Length of Argument Caption { Argument Caption }
	1 Argument Type (0-F) *1*
	1 Length of Default Argument Value { Default Argument Value }
	1 Length of Menu { Menu }
 }
}