Evidence of jurisdiction. What is it?

I understand its importance, did some studying on it(hard to find)though dont thoroughtly understand it. What is it? evidence, as in case evidence though instead of it being that, its jurisdiction evidence? Do the two have nothing to do with eachother? basically getting clarifications to clarify in arraignment, i got all my softball ones. This is my first hardball one to challenge jurisdiction after cementing the judge/prosecutor in with the softball ones  also will be doing a series of questions concerning court, nothing as big of a question as this one.