Dataset, WLF file, and virtual commands

The table below provides a brief description of the actions associated with datasets, WLF files, and virtual commands. For complete details about syntax, arguments, and usage, refer to the ModelSim Command Reference.

Command name	Action
dataset alias	closes the specified dataset
dataset list	lists all open datasets
dataset open	opens a dataset
dataset rename	assigns a new logical name to the specified dataset
log	creates a WLF file for the current simulation
nolog	suspends writing of data to the WLF file for the specified signals
searchlog	searches one or more of the currently open WLF files for a specified condition
virtual function	creates a new signal that consists of logical operations on existing signals and simulation time
virtual region	creates a new user-defined design hierarchy region
virtual signal	creates a new signal that consists of concatenations of signals and subelements
virtual type	creates a new enumerated type
vsim -wlf <filename>	creates a WLF file for the simulation which can be reopened as a dataset

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