Methods and apparatus, including computer program products, for making information available between enterprises. In one aspect, a method includes: receiving from a first enterprise multiple instances of tag-read-data for first articles including information read automatically from tags bound to the articles, article locations, and data derived from a first data processing system of the first enterprise; receiving from a second enterprise multiple instances of tag-read-data for second articles and data derived from a second data processing system of the second enterprise; using the tag-read-data to maintain virtual representatives for the articles in a virtual world, where tag-read-data received from either enterprise for a particular article is used to update the virtual representative corresponding to the article; and making available information from updated virtual representatives and from the virtual world to both the first enterprise and the second enterprise.