These are request errors (as opposed to system errors) that occur due to problems with business-level data (e.g., an invalid combination of arguments) that the application passed in.
A unique code that identifies the particular error condition that occurred. Your application can use error codes as identifiers in your customized error-handling algorithms. See the "Errors by Number" document.
See the Field Index to learn which calls use ErrorCode.
This optional element carries a list of context-specific error variables that indicate details about the error condition. These are useful when multiple instances of ErrorType are returned.
See the Field Index to learn which calls use ErrorParameters.
Indicates whether the error is a severe error (causing the request to fail) or an informational error (a warning) that should be communicated to the user.
See the Field Index to learn which calls use SeverityCode.