The example you gave with the value of +sip.instance between double
quotes is valid, I have seen it many times like this.

On the other hand, other parameters of Contact header can usually be
without quoted value, like:

Contact:<sip:user@domain>;reg-id=1

Both types can be in the header at the same time.

Is the value with double quotes making troubles somewhere?

Cheers,
Daniel

On 08.10.19 16:38, Duarte Rocha wrote:
> Thank you for your answer.
> The green example was just for testing. My real example is similar to
> yellow on a header parameter since i have a client sending me the
> value of sip.instance between quotes and i can't identify the value
> when it is quoted. 
>
> Example :
> Contact:<sip:user@domain>;+sip.instance="<urn:uid:00000000000000>"
>
> It seems to me be a valid sip parameter, but if it's not i'll warn the
> client
>
> A terça, 8/10/2019, 15:29, Daniel-Constantin Mierla <mico...@gmail.com
> <mailto:mico...@gmail.com>> escreveu:
>
>     Hello,
>
>     the values of parameters can be quoted or unquoted, depending on
>     the format (e.g., URI parameters have to be unquoted). If they
>     start with a quote, then it has to be terminated with the same
>     quote and then the value is in between the quotes. The {param}
>     transformation is using the same parser as for parameters in SIP
>     message.
>
>     Now, I am not sure if quote is allowed in an unquoted parameters
>     like green, the grammar in SIP specs has to be checked...
>
>     Cheers,
>     Daniel
>
>     On 08.10.19 16:09, Duarte Rocha wrote:
>>     Hi David.
>>
>>     I want to ble able to print : yellow = "twelve".
>>     In the green example the "" are printed, but on the yellow
>>     example it is not.
>>
>>     Cheers
>>
>>     A terça, 8/10/2019, 12:36, Duarte Rocha <duarteroch...@gmail.com
>>     <mailto:duarteroch...@gmail.com>> escreveu:
>>
>>         Greetings,
>>
>>          
>>
>>         I'm testing some parameters actions and i found a weird behaviour
>>
>>          
>>
>>         This is my code for the test :
>>
>>          
>>
>>         $var(Parameter_List) =
>>         "blue=twelve;green=twe\"lve\";yellow=\"twelve\"";
>>
>>         xerr("Parameter List = $var(Parameter_List)");
>>
>>         xerr("Value of Parameter blue =
>>         $(var(Parameter_List){param.value,blue})");
>>
>>         xerr("Value of Parameter green =
>>         $(var(Parameter_List){param.value,green})");
>>
>>         xerr("Value of Parameter yellow =
>>         $(var(Parameter_List){param.value,yellow})");
>>
>>          
>>
>>          
>>
>>         The printed logs are the following :
>>
>>         ERROR: <script>: Parameter List =
>>         blue=twelve;green=twe"lve";yellow="twelve"
>>
>>         ERROR: <script>: Value of Parameter blue = twelve
>>
>>         ERROR: <script>: Value of Parameter green = twe"lve"
>>
>>         ERROR: <script>: Value of Parameter yellow = twelve
>>
>>          
>>
>>         I have also tried setting the string as :
>>
>>         $var(Parameter_List) =
>>         'blue=twelve;green=twe"lve";yellow="twelve"'; 
>>
>>         But the results were similar
>>
>>         The "" are not recognized in some scenarios. Is this intended
>>         behaviour or should i submit it as a bug?
>>
>>          
>>
>>          
>>
>>         Best Regards,
>>
>>          
>>
>>         Duarte Rocha
>>
>>          
>>
>>
>>     _______________________________________________
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>
>     -- 
>     Daniel-Constantin Mierla -- www.asipto.com <http://www.asipto.com>
>     www.twitter.com/miconda <http://www.twitter.com/miconda> -- 
> www.linkedin.com/in/miconda <http://www.linkedin.com/in/miconda>
>     Kamailio Advanced Training, Oct 21-23, 2019, Berlin, Germany -- 
> https://asipto.com/u/kat
>
-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Kamailio Advanced Training, Oct 21-23, 2019, Berlin, Germany -- 
https://asipto.com/u/kat

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