In Pathfinder, half-elves have the following racial trait:
Elf Blood: Half-elves count as both elves and humans for any effect related to race.
Since now I always considered that it meant that a half-elf could for example be an Ancient Lorekeeper which is "available to elven oracles", or a Brightness Seeker which has "race: elf" as a prerequisite.
But it seems to me more and more odd that this is possible, on top of the other stuff that is specifically designed for half-elves.
What is the official ruling on the subject? Can a half-elf took an archetype, a prestige class, a feat or other stuff with "being an elf" as a prerequisite?
As a sidenote I deliberately didn't put "elf" as a tag since the same question could be asked for any race with the "X blood" racial trait (eg half-orcs).