EN
In the paper principles of workflow class systems were presented and discussed. The attention was paid to engines of workflow systems, which are supporting control workflow. Entire workflow portals were presented too. Commercial and opensource solutions became the subject of the description. One of the wokflow class system was shows as a example of system conception for managing the electronic documentation. Example of the implementation wokflow class system was presented too. In the summary the advantages and disadvantages of the solution and the predicted future of the systems were described.