I wish that was true.
You can use the search option before opening a new thread, anyway, properties like pavg are used to store extra information in some elements. For example, what VIRS will convert back into or storing/preserving the particle info while it passes through PIPE etc.
Not actually usefull for end user tho, playing with them might cause unexpected behaviours.
Here are some of the elements that uses it, GLAS QRTZ TUNG STOR PIPE PPIP VIRS.