Is it OK to hide microdata with CSS?

Question

let's say I have some html document with a lot of text. Is it "good" (~not bad :)) to have elements that contain microdata and hide those elements so that user won't actually see them?

Let's say I have this:

<div style="display:none" itemscope...>some microdata describing div below</div>
<div> There is actual text that is described by microdata</div>

The point is that this way it may be easier to describe the 2nd div. You don't have to make changes in whole text, just add some elements and hide them. I want to create simple HTML editor that would support creating microdata and this way seems to be easier to implement and personally easier to use (first create actual content, then annotate it).