Explanation of icons in PSA tree

Explanation of the PSA tree:
The application components are arranged under the root:
@6F@ Application components
The InfoSources and InfoObjects, for which data is available in the PSA
are arranged under an application component:
@6E@ InfoSource for transaction data
@81@ Active characteristic (InfoObject)
@82@ Inactive characteristic (InfoObject)
Those PSAs in which data can be found are arranged under the InfoSources
and InfoObjects.
@9L@ Active PSA
@9M@ Inactive PSA
Under each PSA you can see the requests that have been updated to this
PSA.
@9P@ Request that has been updated in (at least) one InfoCube
@9O@ Request that has not yet been updated in an InfoCube (previously
only available in PSA).
The icon in the first column behind the request shows the monitor
status.
@5B@ Green traffic light in the monitor (correct request)
@5D@ Yellow traffic light in the monitor (incomplete request)
@5C@ Red traffic light in the monitor (incorrect request).

Error message extract from SAP system. Copyright SAP SE.