Henrik, Thank you for your reply. what make me pazzled is, i want to write a regex within one line in direct "cache deny nocache" for easy maintenance. the nocache is my url_regex name; my aclname function: for some urls: ---Star--- img.domain.com/a/* img.domain.com/b/* img.domain.com/x/logo.jpg ----End--- i want only cache http://img.domain.com/x/logo.jpg, and all others nocache. i have writed the direct: ----Star--- acl nocache url_regex ^http://a\.com/.*$ acl nocache url_regex ^http://b\.com/.*$ *** acl nocache url_regex ^http://c\.com/.*$ cache deny nocache ----End--- So, i want to add one line to above, position with tag "----Star---". i write this: acl nocache url_regex ^http://img\.domain\.com/.*$ && !^http://img\.domain\.com/x/logo\.jpg but, all not cached, contain http://img.domain.com/x/logo.jpg what i want cached. -- Best regards Felix New