Looking for a help to build URL in REST

Hi Experts,

I would like to construct URL and what ever values in the URL need to be read and mapped in the mapping with dynamic configuration. I am using REST sender adapter with HTTP operation 'GET' . in the rest resource I have maintained in the Dynamic attributes

what variable will be selected for URL ?

in value source is it Get variable or URL pattern Element? based on the above how can we create URL?

http://XXXXXX.com:50000/RESTAdapter/appointmentAndAdvisement/ { }

Do we need to write URL pattern with variables in the below ?

/{operation}/businessID/{businessID}/installation/{instalation}

How many types can we generate URLs?

Thanks

Praveen