是……的 construction without 的? I don't fully understand the grammatical structure of the following sentence:


  我来是要了解这一地区的市场情况。


Specifically I'm confused about the 是 in this sentence. It reminds me of the 是……的 construction, but there's no corresponding 的.

Is there some kind of pattern in this sentence that I'm missing?
Rephrase it a bit and you can get the 是……的 construction.


我來(的)是要瞭解這一個區的市場情況。
我是要瞭解這一個區的市場情況來的。


I wouldn't phrase this sentence using the 是……的 construction though, the detail 要瞭解這一個區的市場情況 is a bit long, plus it contains another 的 inside the detail, making it more easily misunderstood.