I'm not entirely sure what the question is aimed at so I'll throw some things out and hope one of them is what you are looking for:
- Most dynamic data comes with tooltip data
- To put not the tooltip but another property of the dynamic data, e.g. the text property, into a tooltip or to combine different dynamic data into one tooltip you need to use scripting (and to filter the dynamic data's tooltip). It usually makes sense to use OnHoverIn for that, but if you need a tooltip that updates while you hover over it you can use OnChange/OnTextChanged.
- If you need to do any layout beyond mere lines of text you'll need to edit the templates. However, unlike Rothgar mentioned I would not recommend to edit eq2ui_examine.xml since that will affect a whole range of tooltips in game at the same time (unless that is what you want), instead add a tooltip style and apply that to the object you want to have the reskinned tooltip.