Difference between Input/Primary voltage vs. Output/Secondary voltage

Hello,

I'm trying to understand the difference between these features:

- EF000106: Input voltage
- EF003775: Primary voltage

and

- EF001470: Secondary voltage
- EF000107: Output voltage

Isn't primary the same thing as input, and secondary the same thing as input? In the case of "Secondary voltage", theres a remark by Philips that states "Philips: Rated (secondary) supply voltage", but I don't understand what it is refering to.

Thanks,

Roberto

I assume both are exchangeable as well, probably just a matter of terminology, where primary and secondary are common related to transformers (referring to primary and secondary coil)