Github user JPercivall commented on a diff in the pull request:
https://github.com/apache/nifi-minifi/pull/50#discussion_r86903300
--- Diff: minifi-docs/src/main/markdown/System_Admin_Guide.md ---
@@ -391,6 +391,39 @@ Within the Processor Configuration section, there is
the `Properties` subsection
State File: ./conf/state/tail-file
Initial Start Position: Beginning of File
+## Process Groups
+
+Process groups can be nested from the top level. They can contain other
process groups as well and can be used to logically group related operations.
+
+*Property* | *Description*
+----------------------------------- | -------------
+name | The name of what this process group
will do.
+id | The id of this process group. This
needs to be set to a unique filesystem-friendly value (regex: [A-Za-z0-9_-]+)
+Processors | The processors contained in this
Process Group. (Defined above)
+Remote Processing Groups | The remote processing groups
contained in this Process Group. (Defined below)
+Connections | The connections contained in this
Process Group. (Defined below)
+Input Ports | The input ports contained in this
Process Group. (Defined below)
+Output Ports | The output ports contained in this
Process Group. (Defined below)
+Process Groups | The child Process Groups contained
in this Process Group.
+
+## Input Ports
--- End diff --
Similar to what we had with PGs, during validation we should check if the
root PG has input/output ports (and fail if so)
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