thank you verry much

Heloo I need help with editing xml file with many producs ( >1000) I want to remove all lines with contain specified caracters, for example my code is: <media><images>http://www.chinabuye.com/media/catalog/product/f/i/file_2209_146.jpg</images><images>http://www.chinabuye.com/media/catalog/product/7...