what is target id in this code

what is target id is it application id or what. what should be its data type.

NSString *message = @"test message here";
NSMutableDictionary *params = [NSMutableDict开发者_StackOverflow社区ionary dictionary];
[params setObject:message forKey:@"message"];
[params setObject:toID forKey:@"target_id"];
[[FBRequest requestWithDelegate:self] call:@"facebook.Stream.publish" params:params];

please answer soon....

Read the beginning of this post.

Its a key in params. from the looks of things (not for sure, since you provide basically no code or context of the code) it is a string that contains the ID to which you are sending your facebook request. Try looking in the API for the Library you are using.

Documented here: http://developers.facebook.com/docs/reference/rest/stream.publish

The ID of the user, Page, group, or event where you are publishing the content. If you specify a target_id, the post appears on the Wall of the target profile, Page, group, or event, not on the Wall of the user who published the post. This mimics the action of posting on a friend's Wall on Facebook itself.