Project Task Supported Operations
The following operations are supported for use with the project task record:
add | addList | attach / detach | delete | deleteList | get | getDeleted | getList | getSavedSearch | getSelectValue | search | searchMoreWithId | update | updateList | upsert | upsertList
Note:
You can also use the asynchronous equivalents of SOAP web services list operations. For information about asynchronous operations, see SOAP Web Services Asynchronous Operations. For more information about request processing, see Synchronous Versus Asynchronous Request Processing.
Regarding the attach operation, note that you can attach files, but not contact records.