System-generated identifiers

Specify whether to use shorter names for the $N token in system-generated identifiers

Model Configuration Pane: Code Generation / Identifiers

Description

Specify whether the code generator uses shorter, more consistent names for the $N token in system-generated identifiers.

Dependencies

This parameter:

• Appears only for ERT-based targets.

• Requires Embedded Coder^® when generating code.

Settings

Shortened (default) | Classic

Classic

Generate longer identifier names for the $N token. For example, for a model named sym, if:

• Global variables is $N$R$M, the block state identifier is DWork_sym.

• Global types is $R$N$M, the block state type is a structure named sym_D_Work.

Shortened

Shorten identifier names for the $N token to allow more space for user names. This option provides a more predictable and consistent naming system that uses camel case, no underscores or plurals, and consistent abbreviations for both a type and a variable. For example, for a model named sym, if:

• Global variables is $N$R$M, the block state identifier is DW_sym.

• Global types is $R$N$M, the block state type is a structure named sym_DW.

System-generated identifiers per model

Classic	Shortened	Data Representation	Description
BlockIO, B	B	Type, Global Variable	Block signals of the system
ExternalInputs	ExtU	Type	Block input data for root system
ExternalInputSizes	ExtUSize	Type	Size of block input data for the root system (used when inputs are variable dimensions)
ExternalOutputs	ExtY	Type	Block output data for the root system
ExternalOutputSizes	ExtYSize	Type	Size of block output data for the root system
U	U	Global Variable	Input data
USize	USize	Global Variable	Size of input data
Y	Y	Global Variable	Output data
YSize	YSize	Global Variable	Size of output data
Parameters	P	Type, Global Variable	Parameters for the system
ConstBlockIO	ConstB	Const Type, Global Variable	Block inputs and outputs that are constants
MachineLocalData, Machine	MachLocal	Const Type, Global Variable	Used by ERT S-function targets
ConstParam, ConstP	ConstP	Const Type, Global Variable	Constant parameters in the system
ConstParamWithInit, ConstWithInitP	ConstInitP	Const Type, Global Variable	Initialization data for constant parameters in the system
D_Work, DWork	DW	Type, Global Variable	Block states in the system
MassMatrixGlobal	MassMatrix	Type, Global Variable	Used for physical modeling blocks
PrevZCSigStates, PrevZCSigState	PrevZCX	Type, Global Variable	Previous zero-crossing signal state
ContinuousStates, X	X	Type, Global Variable	Continuous states
StateDisabled, Xdis	XDis	Type, Global Variable	Status of an enabled subsystem
StateDerivatives, Xdot	XDot	Type, Global Variable	Derivatives of continuous states at each time step
ZCSignalValues, ZCSignalValue	ZCV	Type, Global Variable	Zero-crossing signals
DefaultParameters	DefaultP	Global Variable	Default parameters in the system
GlobalTID	GlobalTID	Global Variable	Used for sample time for states in referenced models
InvariantSignals	Invariant	Global Variable	Invariant signals
NSTAGES	NSTAGES	Global Variable	Solver macro
Object	Obj	Global Variable	Used by ERT C++ code generation to refer to referenced model objects
TimingBridge	TimingBrdg	Global Variable	Timing information stored in different data structures
SharedDSM	SharedDSM	Type, Global Variable	Shared local data stores, which are Data Store Memory blocks with Share across model instances selected
InstP	InstP	Type, Global Variable	Parameter arguments for the system

System-generated identifier names per referenced model or reusable subsystem

Classic	Shortened	Data Representation	Description
rtB, B	B	Type, Global Variable	Block signals of the system
rtC, C	ConstB	Type, Global Variable	Block inputs and outputs that are constants
rtDW, DW	DW	Type, Global Variable	Block states in the system
rtMdlrefDWork, MdlrefDWork	MdlRefDW	Type, Global Variable	Block states in referenced model
rtP, P	P	Type, Global Variable	Parameters for the system
rtRTM, RTM	RTM	Type, Global Variable	RT_Model structure
rtX, X	X	Type, Global Variable	Continuous states in model reference
rtXdis, Xdis	XDis	Type, Global Variable	Status of an enabled subsystem
rtXdot, Xdot	XDot	Type, Global Variable	Derivatives of the S-function's continuous states at each time step
rtZCE, ZCE	ZCE	Type, Global Variable	Zero-crossing enabled
rtZCSV, ZCSV	ZCV	Type, Global Variable	Zero-crossing signal values
rtSharedDSM, SharedDSM	SharedDSM	Type, Global Variable	Shared local data stores, which are Data Store Memory blocks with Share across model instances selected
rtInstP, InstP	InstP	Type, Global Variable	Parameter arguments for the system

Note

When you set the System-generated identifiers parameter to Shortened, while generating an identifier for a global variable of a referenced model which is a run-time parameter, the code generator adds a prefix rtP_ to the variable name for the $N token.

Recommended Settings

Application	Setting
Debugging	No impact
Traceability	No impact
Efficiency	No impact
Safety precaution	No impact

Programmatic Use

Parameter: InternalIdentifier

Type: character vector

Value: Classic | Shortened

Default: Shortened

Version History

Introduced in R2013a