they pretty much have no nutritional value at all, not even calories. in the brand i buy it pretty much has 0 grams for everything but sodium. i eat them once in a while when i'm desperate to eat something or just feel like chasing away a craving for something sweet. believe me, it gets the job done very wel.
I think the reason they are not in the book is because of the sodium content. If you eat a few, I would count them as a condiment, but I bet the COD would say if you wrote them in your book. Just get in some extra water and I think you will be fine.