Technical artifacts with a long lifetime put special requirement on management of technical information. The information need to be managed and maintained to keep it understandable and valid for as long as needed and this put high requirements on effective information management because it is necessary to keep track of which technical information that is valid for which variant of technical artifact. This article is based on a study where requirements on technical information was in focus and especially requirements that concern traceability. Seven requirements have been identified and it have been concluded that those requirements basically concern between which object that the traceability concern, that it matters if a requirement is put from internal or external need or if the requirement concern objects from different information systems. The conclusion is that a requirement is harder to reach if the connections between objects are separated in different information systems.