User-Defined Function w/ List Parameter

Lydia, thanks for the reply.  I didn't find Chris's blog on parameters very helpful in the circumstances that led me to post my concern.  Let's say that I have shared a user-defined function via my Data Catalog, and that function is designed to accept a list of lists ( e.g., {{"A","apple"},{"B","banana"},{"C","cherry"}} ) rather than a table.  Now when a less sophisticated user attempts to add a custom table column by invoking my user-defined function ( using the Add Column Invoke Custom Function ribbon tool ) they are prompted for a table column to be passed as an argument rather than the intended list of lists.  Shouldn't the invocation recognize that such a circumstance could exist, and allow for a drop-down list of all list objects as well as a drop-down list of tables from which a single column could be selected?