[NTG-context] Framed text with arrows

Hi, I'm a novice yet. I just want to put framed long texts (paragraphs) with arrows connecting these. I want to decorate these frames (background, beaty border, etc.). Like entity-relationship diagrams but more beauty and that I could put long text in each node. Is this possible? Do I must use metafun? Can you provide a simple example? Thanks a lot, Xan. PS: Please, CCme.