When reading table 21, section 2.4.7 of the FMI standard I think the Start tag can also be left out. In this case the FMU implementation sets 127.0.0.1 as default. Comparing with the given example for the array of string parameters there it seems there must be a check for a scalar variable that can have a start value.

I have tried the following example with fmpy 0.3.15

    <String name="org.fmi-standard.fmi-ls-xcp.ListenIpAddress"
            valueReference="2"
            causality="structuralParameter"
            variability="fixed"
            description="IP address where the XCP slave listens for XCP protocol commands.">
        <Dimension start="6"/>
        <Start value="127.0.0.1"/>
        <Start value="127.0.0.2"/>
    </String>

It's accepted by the generic fmpy importer and should be rejected by the fmi-ls-xcp implementation of the importer.

Structural Parameters must always have a start value, so the Start element for the address is mandatory. The number of start values provided is determined by the dimensions of the variable, which for a scalar means exactly one value. This is defined by the base standard, so the XCP LS might at most want to point out that the required variables are to be scalar, i.e. not arrays.

I agree with Pierre. @PenndorfT Is that fine for you and can you change this in the document?

Obsolete after discussions in #19 and #20