Hi all We're about to batch change several thousand records because we're modifying the URL used to access our proxy server. To do this should we do the following? Add a new MARC modification template Add a new action to it: Copy and Replace > Every > 856 > u > to field > 856 > u > regex > s/[portion of URL to be changed]/[replacement string for new URL]/g > if > field > 856 > u > matches > m/[portion of URL to be changed]/ >regex Does that look right? Also, with escaping the strings to find/replace, would the regex look like this (assuming that we're looking for 'http://proxy.dml.vic.edu.au:2048/' and replacing it with 'https://proxy.dml.vic.edu.au/')? s/http\:\/\/proxy.dml.vic.edu.au\:2048\//https\:\/\/proxy.dml.vic.edu.au\//g With kind regards from the Dalton McCaughey Library Team Carlos Lopez Dalton McCaughey Library | 29 College Crescent, Parkville, VICTORIA 3052 Ph: 03 9340 8888 ext.1 | library@dml.vic.edu.au<mailto:library@dml.vic.edu.au> | library.dmlibrary.org.au