Abstract
This research is dedicated to the examination of collaboration problems in industrial enterprise content management (ECM) systems. In the article we try to define how collaboration is organized during simultaneous use of documents, files and other securable objects and how the well-known problems of access control are solved. In the first part of the article several popular ECM systems are analyzed and classified by the storage methods for object versions and special issues of access control. It was found out that the existing systems do not allow to simultaneously grant permissions to every version of an object and to provide a user-friendly centralized access control with consideration to the relation with processes and tasks in ECM. Then the model which solves this problem and which is implemented in Evfrat system is described. In the end the relevance of this model to the general requirements for collaborative environments is disputed and the model is compared to other models.
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