That is a general - and highly valid - objection to the state of Kamailio documentation. By and large, it's a reference, with no conceptual glue, in narrative form, or methodological instruction. There is only information on how to do X, not what X is or why you would want to do it.

We are trying to change that. Progress is slow, undeniably.

"Victor V. Kustov" <coyote@bks.tv> wrote:

В Fri, 19 Apr 2013 11:54:18 +0300
Juha Heinanen <jh@tutpro.com> пишет:

http://www.kamailio.org/wiki/cookbooks/devel/pseudovariables

I think info from all comments in this thread must be included in
cookbook. Without such layer, without conceptual things it not 'book',
just remarks on fields.

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