ORD schemes that support querying the SystemDb

ORD schemes that support querying the SystemDb

The following ORD schemes facilitate the resolution of indexed entities.

CAUTION: Frequent querying can slow down the System Database. If you execute a SystemDb query frequently, the SystemDb performance degrades.

“nspace” ORD scheme
Provides global resolution of objects. This common ORD format is used for all entities indexed into the systemDb and is flexible enough to accommodate different use cases.
- Local station example:
  nspace:SupervisorName|slot:/a/b/c
- Remote station example:
  nspace:DeviceName|slot:/a/b/c
  
  Note that this ORD resolves on a Supervisor station to the following NiagaraVirtual: station:|slot:/Drivers/NiagaraNetwork/DeviceName/virtual|virtual:/a/b/c
“sys” ORD scheme
Allows queries against the SystemDb (supports only NEQL, not BQL).
- Query the entire SystemDb for all devices in the system:
  ip:<SupervisorIP>|foxs:|sys:|neql:n:device
- Scoped query against the SystemDb for ModbusTCP devices in subordinate station:
  ip:<SupervisorIP>|foxs:|nspace:DeviceName|slot:/Drivers/ModbusTCPNetwork|sys:|neql:n:device