Code Generation Template: the definition of "$parameter1"

[Jsc]

Hello,
I am a novice for code generation and my EA version is EA 13.5. I have a question about the definition of "$parameter1" in code generation template.
I want to create a new template to generate state machine in a new language. Firstly i have tried to understand the existing template in C, C## and C++ language.
In template "State" for C#, I have found the following code:

Code: [Select]

%PI=""%
$GUID = $parameter1
%if $GUID==""%
%endTemplate%

$COMMAND_TYPE = "CommandType"
$COMMAND_VAR = "command"
$TRANSCEND_VAR = "transcend"

$IsFinalState = %EASL_GET("Property", $GUID, "IsFinalState")%
%if $IsFinalState == "true"%
%endTemplate%
I do not understand the definition of this string variable "$parameter1". In this template, I have not found any definition of this variable. But it seems like this variable is automatically assigned by Information like GUID or something else.

thanks

[Eve]

https://www.sparxsystems.com/enterprise_architect_user_guide/15.0/model_domains/call_templates_from_templates.html

[Jsc]

Thanks Eve