Thanks for your that, I think I get the broad strokes. Let me run it back, just to check:
PHP queries the database (how is this/the TW_Applet invoked?) and writes the key/value pairs returned into an html page; these k/v pairs are read in to TW as ExternalParams
I can see how this works for a serverside db, but how about for a local eg SQLite/iOS database? I need to store a number of wordlists + associated data for each word locally on the device (or I think I do, anyway!).
Many thanks, fantastic support from Caspian!