Use this function to return additional feed URLs to be processed with optional function prefixes. All subsequent function calls relating to a particular feed URL require the specified function prefix. This can be used to handle paging or to process different but related feeds.

Inputs: xml (XmlDocument)
Outputs: urls (list:{string} or table:{string->string} or table:{string->list:{string}})
See also:  


function myPrefix_getNextUrls(xml)
   return { "http://...", prefix1="http://...", prefix2={"http://      ...", "http://..."} }