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External Data Source

Source

Regular Expression
((http|https|ftp|telnet|gopher|ms\-help|file|notes)://)?(([a-z][\w~%!&',;=\-\.$\(\)\*\+]*)(:.*)?@)?(([a-z0-9][\w\-]*[a-z0-9]*\.)*(((([a-z0-9][\w\-]*[a-z0-9]*)(\.[a-z0-9]+)?)|(((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)))(:[0-9]+)?))?(((/([\w`~!$=;\-\+\.\^\(\)\|\{\}\[\]]|(%\d\d))+)*/([\w`~!$=;\-\+\.\^\(\)\|\{\}\[\]]|(%\d\d))*)(\?[^#]+)?(#[a-z0-9]\w*)?)?