document: Global action rules in distributed knowledge systems Previously Z. Ras and J.M. Zytkow -LRB- 2000 -RRB- introduced and investigated query answering system based on distributed knowledge mining . The notion of an action rule was introduced by Z. Ras and A. Wieczorkowska -LRB- 2000 -RRB- and its application domain e-business was taken . In this paper , we generalize the notion of action rules in a similar way to handling global queries . Mainly , when values of attributes for a given customer , used in action rules , can not be easily changed by business user , definitions of these attributes are extracted from other sites of a distributed knowledge system . To be more precise , attributes at every site of a distributed knowledge system are divided into two sets : stable and flexible . Values of flexible attributes , for a given consumer , sometime can be changed and this change can be influenced and controlled by a business user . However , some of these changes -LRB- for instance to the attribute `` profit ' -RRB- can not be done directly to a chosen attribute . In this case , definitions of such an attribute in terms of other attributes have to be learned . These new definitions are used to construct action rules showing what changes in values of flexible attributes , for a given consumer , are needed in order to re-classify this consumer the way business user wants . But , business user may be either unable or unwilling to proceed with actions leading to such changes . In all such cases we may search for definitions of these flexible attributes looking at either local or remote sites for help
doc_bio_tags: B I I O O O O O O O O O O O O O O O O B I I O O B I I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B I O O O O O O O O O O O O O O B O O O O O O O B I O O O O O O O O O O O O O B O O O O O O O O O O O O O O O O B O O O O O O O O O O O O O O O O O O O O O B O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B O O O O O O O O O O O O B I O O O O O O O B O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B O O O O O O O O O
extractive_keyphrases: global action rules query answering system action rules attributes distributed knowledge mining
abstractive_keyphrases: e-commerce