Web Service Requests are created with defaults parameters. Each one must be completed to define at least the method that will be called on the application's web service (Method Name field).
Request Data method is used for web services that required a request body like SOAP requests for example. In this case, a Page Template is created to define the body and the name of it is defined in this field. (See following slides for an example)
Brain class are used by methods which returns objects. There is some default classes which should manage most of the cases. If specific cases happens, this allow to use a custom class. Creation of a specific brain will be required for transactions objects for example due to the link with other object of the application. This part is treated later in the documentation.
Parser dict method is used for web services that returns XML data. As this XML is not expected to follow any specification, it must be converted to ERP5 object properties. This field allow to defined a script to call that will return the mapping dictionnary used by the sax parser to do this mapping. (See following slides for an example).
Object Type defined the type of object that will be created on ERP5 side, this is used only by *_module methods.