Abstract: A method, data processing system, and computer program product are provided for searching for access rules included in access control lists (ACLs), such as those rules used to accept or deny packets received at a router. An incoming packet that includes several fields is received. An original key is formed from some of these fields. The original key is masked using predefined masks with each predefined mask corresponding to a different hash table. The masking of the original key results in masked keys where each of the masked keys corresponds to a different hash table. One or more hash tables are searched using the masked keys. The searching results in one or more possible rules. Each of the possible rules has a priority value. The possible rule that has the highest (best) priority is selected, and the selected rule is applied to the incoming packet.

Abstract: Use of a biocompatible dye, for example patent blue V or brilliant blue R, for the production of a dye agent for non-cytotoxic visualisation of cells, in particular delimiting or separating membranes in the human or animal body, in particular in the eye.