There are increasing efforts to provide integrated access to archive, library and museum information. When it comes to creating information systems, the deep difference in the organizational cultures becomes apparent. Working groups from CIDOC-ICOM and IFLA have come together from 2003 to 2008 to analyze how museum and library conceptualization relates and have built a common conceptual model. It includes an innovative model of performing arts from a documentation perspective. This paper argues on the example of performing arts how the common model can be used to integrate information across institutions in a more effective way than by current approaches. The work on this model revealed an important generic form of creative activity, the “incorporation” of an expression of a work in the expression of a work of another form or kind.