How can I use constants (in microflow)?

I define a constant (let's call it 'a') in the resources of my project. But how can I use that constant in a microflow? When I use it in a XPath constraint as '$a' I get an error..
1 answers

Use the @ sign in front of the constant, for example: @EncryptionKey

For using this in an Xpath, you could create a temporary variable in the microflow which you assign the value of this constant.