IPXact parameter with empty/no value

[Khushi]

Hello

How I can specify a parameter in IP-Xact 2014 with default value is empty (e.g. empty string). If I just omit the value like <ipxact:value></ipxact:value> or <ipxact:value/>, the schema validation fails

xml code :

<ipxact:parameter parameterId="param1id">
      <ipxact:name>param1</ipxact:name>
      <ipxact:value></ipxact:value>
</ipxact:parameter>

xmllint -noout -schema schema/1685-2014/index.xsd test.xml
test.xml:146: element value: Schemas validity error : Element '{http://www.accellera.org/XMLSchema/IPXACT/1685-2014}value': [facet 'minLength'] The value has a length of '0'; this underruns the allowed minimum length of '1'.
test.xml:146: element value: Schemas validity error : Element '{http://www.accellera.org/XMLSchema/IPXACT/1685-2014}value': '' is not a valid value of the atomic type '{http://www.accellera.org/XMLSchema/IPXACT/1685-2014}simpleBaseExpression'.
test.xml fails to validate

Thank you

Khushi

[kock]

Hi Kushi,

IP-XACT does not allow that. Parameters always need to have a default value.

Best regards,
Erwin

[Khushi]

Thank you Erwin

We have a use case where we have a string parameter at component level with a default value "" (empty string) which can be overwritten per instance in the design.

This is why I am looking for something like <ipxact:value></ipxact:value> or <ipxact:value/>

Is there a way to express this ?

Thank you

Khushi

 

[kock]

Hi Kushi,

Yes, you can express it like this:

    <ipxact:parameters>
        <ipxact:parameter parameterId="myparamID" ipxact:resolve="user">
            <ipxact:name>myparam</ipxact:name>
            <ipxact:value>""</ipxact:value>
        </ipxact:parameter>
    </ipxact:parameters>
 

The value "" denotes an empty string. The value of the value element is an expression. An empty expression is not allowed. If you want to put a constant string then you have to quote it. You can override it in a design instance by referencing the parameterId attribute value.

Best regards,
Erwin