Hello,

We have multiple elements running different versions of a protocol (one in test with a new version and others running on stable).

As part of the new protocol, we have a new param ID which is not present on the existing protocol.

We use these elements with a functions file and DVEs to expose information to services and as part of the new protocol we have created a new functions.xml to give us access to the new parameter.

The question, do the functions files fail gracefully? We would like to be able to test the new functions file with the new protocol however I don't want to risk causing changes to the existing old version of the protocol and elements that use it. Do we know what the behaviour will be on the old protocol versions if they do not have a parameter - i.e. will it cause the existing to fail or will they ignore parameters in the xml that are not available

Many thanks!

Oliver