[CMake] what does <NAME> mean?

[SK]

Hello, In many cmake modules, I see <> used around names, as in:

SET(CMAKE_C_COMPILE_OBJECT     "<CMAKE_C_COMPILER>   <FLAGS> -o
<OBJECT> -c <SOURCE>")

What does this <SOMENAME> notation mean?  I looked around but missed
this in the documentation.

Thanks,
-steve