[timshadel]

OK. Let's go back to the source. I found this on page 49 of Getting Things Done. Here's a paraphrased summary:

The Four-Criteria Model for Choosing Actions in the Moment

For me, this is what I think of when I'm in the Context view of OF

Context Most actions require a specific location or productivity tool. That limits your choices on what you can do in the moment.

OF supports this, obviously.

Time Available Having a meeting in five minutes prevents you from doing many actions.

OF supports this as well.

Energy Available Some actions require a reservoir of fresh creative energy, others need physical horsepower.

Doesn't look like OF supports this directly.

Priority Give the context, time, and energy, what action will give you the highest payoff? (His examples in the book are cross project examples)

OF doesn't support this either

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To me, the first three are filters, and the last one is a sort of remaining actions with NO grouping.