System-generated identifiers - Specify whether to use shorter names for the $N token in
system-generated identifiers - MATLAB ([original](https://www.mathworks.com/help/ecoder/ref/systemgeneratedidentifiers.html)) ([raw](?raw))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 isDWork_sym. - Global types is
$R$N$M, the block state type is a structure namedsym_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 isDW_sym. - Global types is
$R$N$M, the block state type is a structure namedsym_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 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