The Built-In Data Elements do not appear to be working in the Analytics Extension.
Screen Shot 1 :: Help Article in Launch about Built-in Data Elements
Screen Shot 2 :: What my Analytics call looks like (see yellow highlighting)
Screen Shot 3 :: I copied and pasted the %% from the Help Article into the Analytics Extension
I just saw a demo of a Page Info data element type (provided from the core extension) to give you these options. Will release in Q1 sometime.
In the 9/5 East Coast Structured Meeting, it was shared that, at this time, the Built-in Data Elements will not be included within Launch. There may be some type of Global Data Elements in the future.