Feat prerequisites for aldori dueling sword and other "special" exotic weapons

[devil.in.mexico13]

Basically, the question is, if you never plan on using say a bastard sword one handed, or using weapon finesse with an aldori dueling sword, or, with either weapon, if you took heirloom weapon to be proficient with that specific weapon, do you need the exotic weapon proficiency to qualify for weapon specific feats like weapon focus. Would martial weapon proficiency work as the prerequisite?

[Chris Kenney]

In the case of the Aldori Dueling Sword specifically, it says to treat it as a long sword if you don't have proficency, so you just need to take feats with the long sword to use them with that weapon.

In the other cases, I would say that having proficency with 'all martial weapons' counts except that you can't use the special modes that the EWP allows.