value 'initialValue'

What should the value ‘initialValue’ parameter look like in the code, in front of what should it be, and what is its “false” / “true” operator?
Give an example of writing?

For example:

<value name="Mode control" offset="1" length="1" initialValue="2"></value>

the value of ‘initialValue’ is set to corresponding input when connection is initialized and no frames has yet been received from CAN. Default initialValue is 0.

does this work with ‘target Id’ the same way?

Yes, I don’t see any difference how this is handled with ‘name’ or ‘targetId’