Hi Markushg, When you want to apply condition on any number of attributes based on a pattern match. Then you may consider using anyMatchingAttribute NiFi Function. Here is the link to the documentation: https://nifi.apache.org/docs/nifi-docs/html/expression-language-guide.html#anyattribute In your case, You may have to do something like as below: ${anyMatchingAttribute("syslog.structuredData*os"):equals('linux69')}
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