ServiceDesk API servlet query

ServiceDesk API servlet query

Using the API, how can I perform a query?

for example, I want to retrieve all open requests.
Then I could loop through that list to then read each individual request:
http://myserver:port/servlets/RequestServlet?operation=GetRequestDetails&workOrderID=number&username=user&password=pwd&DOMAIN_NAME=mydomain&logonDomainName=AD_AUTH