Oracle: Viewing settings for DBMS_NETWORK_ACL_ADMIN ACL?

How do I view the contents of a network ACL? For example, if I create this ACL, how can I view what settings have been applied to it? DBMS_NETWORK_ACL_ADMIN.CREATE_ACL( acl => 'www.xml', description => 'WWW ACL', principal => 'SCOTT', is_grant => true, privilege => 'connect' );