Add a 'Case sensitive' option to the Joiner. Sometimes capitalization of attributes differs between source and target attributes. It would be nice if you could just use an option to take this into account or not.
Yes, this is a great idea. In fact, I think this should be an option for a lot of transformers where strings are being compared (e.g. Tester, TestFilter, AttributeValueMapper...). Sometimes, I don't care how FME compares values, but I do need to keep the original writing style. Now I need to copy the old value and apply an @LowerCase() function or StringCaseChanger, which clutters my workflow a little.
The Tester now has Case Sensitive, Case Insensitive options in the Comparison mode. It would be nice if the FeatureMerger/Feature joiner could do so as well.