PLV, PSV in manual

[DUDZIAK Krzysztof]

Hi,

Isn't it that strange if for manual* following searches for a string result in 
no matches?
search for "PLV"
search for "PSV"
search for "Product List Variable"
search for "Product Source Variable"

*) https://www.gnu.org/software/automake/manual/automake.html

Regards
k.d.