DataNode

An object used internally by the Milo engine to represent a value of some type. Arrays of DataNodes are called DataArrays. In a DTB file, the type is explicitly stored, but in DTA files, it is guessed based on the syntax and keywords.

Structure

Name	Size	Function
Value	4 bytes	The value of the DataNode.
Type	4 bytes	The type of the DataNode.

Types

Each Milo game supports a different set of types for a DataNode. The amount of types gradually increased as Milo's scripting engine became more capable over the years.

Rock Band 3

Type Name	Value	Description
INT	0x0	An integer value.
FLOAT	0x1	A 32-bit floating point value.
VAR	0x2	A generic variable. Prefixed by $ in DTA.
FUNC	0x3	A function declaration.
OBJECT	0x4	A pointer to some sort of object.
SYMBOL	0x5	A pointer to a Symbol.
EMPTY	0x6	No value. Equivalent to kDataUnhandled in DTA.
IFDEF	0x7	A conditional checking for the existence of a global macro (such as _SHIP).
ELSE	0x8	The 'else' conditional.
ENDIF	0x9	The 'endif' conditional.
ARRAY	0x10	A pointer to a DataArray. Denoted by () in DTA.
COMMAND	0x11	Executable statements/DataFunc calls. Denoted by {} in DTA.
STRING	0x12	A string value. Usually delimited by single or double quotes in DTA.
OBJECT_PROP_REF	0x13	A pointer to the property of an object. Denoted by [] in DTA.
GLOB	0x14	Unknown.
DEFINE	0x20	A Macro definition.
INCLUDE	0x21	A marker indicating that another DTA/DTB should be included in the current file.
MERGE	0x22	A marker indicating that another DTA/DTB should be merged into the current file.
IFNDEF	0x23	A conditional checking for the non-existence of a global macro (such as _SHIP).
AUTORUN	0x24	Unknown.
UNDEF	0x25	Undefined value.