exceptionfactory commented on code in PR #8101:
URL: https://github.com/apache/nifi/pull/8101#discussion_r1418145271


##########
nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-nar-utils/src/main/java/org/apache/nifi/nar/NarClassLoaders.java:
##########
@@ -74,6 +74,7 @@ private InitContext(
             this.jettyBundle = jettyBundle;
             this.serverInstance = serverInstance;
             this.bundles = bundles;
+            System.setProperty("nifi.version", 
frameworkBundle.getBundleDetails().getCoordinate().getVersion());

Review Comment:
   Good point @dan-s1. The [Expression Language 
Guide](https://nifi.apache.org/docs/nifi-docs/html/expression-language-guide.html#usage)
 notes that System properties can be referenced, but does not list any of them. 
This probably warrants a new short sub-section along the lines of `Framework 
System Properties`, above the `Functions` section.



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