& \:\/\/(([^\/\?\#]*)\@)?([^\:\/\?\#\@]*)(\:([0-9]+))?\/[^\?\#]*\?([^\#]*\&)?(\&|$) \:\/\/(([^\/\?\#]*)\@)?([^\:\/\?\#\@]*)(\:([0-9]+))?\/[^\?\#]*\?([^\#]*\&)?(\&|$) [A-Za-z]+ ([^:/\?#@]+\.)*[^:/\?#@]+ (\:[0-9]+)? iripattern does not conform to the IRI regex (see POWDER Formal document for details)