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External Data Source

Source

Regular Expression
^(http|https|ftp)\://(((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])\.){3}(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])|([a-zA-Z0-9_\-\.])+\.(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum|uk|me))((:[a-zA-Z0-9]*)?/?([a-zA-Z0-9\-\._\?\,\'/\\\+&%\$#\=~])*)$