6.1.2 Virtual obje cts

In the PVSR system the administrator and the restricted administrator users can create sites, equipments and measurements. These items are immediately available for authorized users too: they appear under for example the Measurements menu item, where the individual elements are displayed in the same division and in the same way as the administrators have specified during creation.

This initial hierarchy and its objects are called basic or normal objects. Parallel to this structure both administrators and normal users can develop their own structures; moreover, administrators can create public structures as well. Each level of the basic hierarchy has its parallel equivalent:

·       Virtual site: corresponds to a site object; can be placed under any basic or virtual site, and can contain virtual sites, virtual equipment and linked basic equipments

·       Virtual equipment: corresponds to an equipment object; can be placed under any basic or virtual site, and can contain measurements and private/public charts

·       Private/public charts: correspond to the measurement object; in contrast to that, however, it can contain not only one or two measurement values but also arbitrary measurements, arbitrary calculations based on measurements or report variables. It can be placed under virtual equipments manually. It can automatically appear under basic equipment too if it contains a measurement running on the given equipment or a report summary for that equipment

This parallel structure is used, according to the settings under the Preferences menu item, for the display of both measurements and thresholds filtered by site or equipment. Contrary to this, for the Reports menu item one can move along only the basic hierarchy.

Virtual sites and equipments can be private or public objects: administrator users can create both types, the admin users only the public ones, while the other users only the private ones, a restricted administrator cannot modify a public one except it was created by himself. In both cases, the configuration follows the same principles and there is only one restriction: only public virtual sites, equipments and measurements can be placed under public virtual sites, while only the private ones under private virtual sites.