What the heck are necromancy effects?

[Alchemist 23]

Constructs: Immunity to disease, death effects, necromancy effects, paralysis, poison, sleep effects, and stunning.

That can not mean the whole Necromancy school or else constructs just become OP as hell. So what are Necromancy effects?

[Renata Maclean]

They're immune to the entire Enchantment school, which is arguably far more powerful

So yeah, I'd say the whole Necromancy school. It's a powerful creature type.

[Jeraa]

Necromancy manipulates lifeforce (both positive and negative-based). Constructs don't have any lifeforce to manipulate - they are immune to the Necromancy school of magic.

[Lady-J]

its the entire school, but the school basically deals with just positive and negative energy and resurrection and ability damage/drain and energy drain which the construct gets immunity as well as well as a bunch of conditions that need fort saves which constructs already get immunity to

[Lady-J]

so all in all its not nearly as op as it seems as many of the immunities from necromancy effects overlap with its already defined immunities