Dear all, 

I am looking into options for renaming output files automatically in workflows 
and I found this thread :

I managed to use the following in test workflow:
- ${} to create input variable to the workflow
- #{} to reuse the tool input(s) 

In the post indicated earlier, I read that one can even manipulate input string 
with basename, upper and lower e.g. #{ input | basename}
All this is really awesome and my questions are :

- are there other ways to fetch existing e.g. env variables than ${} or #{} 
- what other variables can be fetched e.g. maybe this 'on_string' ? 
- are there string functions other than basename, upper and lower that can be 
used ? Is there a list?

Thx a lot


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