Duration of Continuous Effects

[Nocturnal]

I am trying to categorize the various lifetimes of continous effects in Magic.
So far, I have come up with four categories:

1. Subject lifetime:
Lasts until subject changes zones (e.g. effect caused by Deathlace)

2. Source lifetime:
Lasts until source changes zones (e.g. Wonder, Humility)

3. End of Turn:
lasts until clean-up (e.g. Giant Growth)

4. Until Absorbed:
lasts until effect is used up (e.g. Regenerate, Circles)

Can you think of any cards that do not fall into one or more of these categories?

[Jebus]

Word of advice (and I think I've said this before), it isn't a good idea to catagorize this stuff.

Continuous effects last for their stated duration or until the effect can no longer apply.

[Jacob Orlove]

This may be for a MODO-style rules engine, in which case categorizing stuff beforehand might make a lot of sense.

[Nocturnal]

This may be for a MODO-style rules engine, in which case categorizing stuff beforehand might make a lot of sense.

Correct.
I was just trying to think if I missed any obvious broad category.  
Once you have the basics, its easy to combine them with logic (AND, OR, NOT, etc)