What does ::cetp::PAL mean?

I have a question about CETP(Common Expect Test Platform), it is a TCL testing platform.

I saw the f开发者_Python百科ollowing code

::cetp::PAL

what does this mean?

That is a command/procedure in the ::cetp Namespace which is named PAL and calls it with no arguments. I don't know what the PAL command does, but the CETP documentation should show you.

The few links i could find that showed ::cept::PAL commands suggest that it is some kind of logging command that outputs its argument to some log file.