Application Override takes effect when a record in the PNT or in the FAC is assigned component-level security.
When component-level security is applied to a point in the PNT service, this security affects not only the point record, but permissions for that point in all other services in which it resides. When component-level security is applied to a facility in the FAC service, this security affects not only the facility record, but permissions for all of that facility’s points in all other services in which they reside, including the PNT. If component-level security is defined in both a PNT record and FAC record for the same point, the PNT security takes precedence.
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Notes:
Application Override should be used sparingly and judiciously. A memory-resident cache is used to check if points/facilities are configured with an application override. If the list gets too big then performance suffers.
FAC and PNT security overrides do NOT prevent administrative applications such as CygNet Explorer from reading data. However it does prevent CygNet Studio files from reading data. Also, ODBC will not honor the FAC and PNT overrides.
See Application Override Security Resolution Examples for more information.
More:
Application Override Security Resolution Tree
Application Override Security Resolution Examples
Application Override Service Configuration
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