... If _callback is set, that means the caller wants results as soon as they are ready. =_callback_ should be set to a reference to a function which takes _cbdata as the first parameter and remaining parameters the same as 'print'. ... This will be used for searching with scope="text" only, because scope="topic" will do a Perl search on topic names. ... Parse the arguments to a $formfield specification and extract the relevant formfield from the given meta data. args string containing name of form field...