I'm searching through the Aggregation API reference and I can't find a comprehensive list of the possible key-value pairs you can supply for the userPreferences parameter to [register3](https://developer.yodlee.com/Indy_FinApp/Aggregation_Services_Guide/Aggregation_REST_API_Reference/register3). My reading of the documentation is that the key and value are tilde-separated, but since none of the sample preferences identified in the Description match the sample key/value pairs in the Example column. The actual user preferences must be documented somewhere, but where?

Or have I incorrectly assumed that these are user preferences that affect Yodlee functionality? Is this just a generic dictionary Yodlee is providing into which I can insert and later retrieve values by any keys I make up, without having any other effect on Yodlee functionality?

Thanks