The meeting IS TO take place at 10 pm [closed]

The meeting is to take place at 10 pm Should "Is to" be mean here as "have to" or "going to"? Another example: Those of you, who sign up are to be commended. This kind of sentences confusing me a bit) What rules in action here?

Solution 1:

It can be used in two meanings:

• More commonly as a statement of expectation, pretty much equivalent to "The meeting is supposed/expected/scheduled to take place at 10 pm".
• Less commonly as an illocutionary act: "I hereby declare that the meeting shall take place at 10 pm". Compare with a bit more salient "The defendant is to pay $5000 in damages to the plaintiff (bam)".

Solution 2:

Essentially (and semantically), is to here functions like will (synonymous with going to):

The meeting will take place at 10p.m.

However, your organization of what goes with what is a little off. To doesn't go with is but rather belongs with take (to take). To is the infinitive marker (to be, to hold, to laugh, etc.).