The Settings tab contains the Endpoint URL, Method Namespace URI, URI Encoding Style, Method Name, Action URI, Result Key, Number of Parameters text fields, and the Parameters list.
Each field can be substituted with work item properties by surrounding the property name with percent signs. In this case, its parameters will be referred to as dynamic parameters.
Note: The percent sign is used to identify work item properties. In order for the work item
properties to be included in the statement, it should be enclosed with percent signs. So if
you want to use the percent sign in the SQL statement, put a backslash in front of each
percent sign, for example:'\%productName\%' resolves to %productName%.