This standard defines the IEEE 1076.1 language, a hardware description language for the description and the simulation of analog, digital, and mixed-signal systems. The language, also informally known as VHDL-AMS, is built on IEEE Std 1076-2002 (VHDL) and extends it with additions and changes to provide capabilities of writing and simulating analog and mixed-signal models.
IEEE Std 1003.1-2008 defines a standard operating system interface and environment, including a command interpreter (or ''shell''), and common utility programs to support applications portability at the source code level. It is intended to be used by both application developers and system implementors.