13. A storage medium for storing a structured document processing program which causes a computer to execute a structured document processing method, said method comprising the steps of: inputting a first structured document including a first element, and first designation information for designating a location in the first structured document at which the first element is included, a second structured document including a second element, and second designation information for designating a location in the second structured document at which no element is included into which the first element is to be inserted; selecting the first element in the first structured document in accordance with the first designation information designating the location in the first structured document at which the first element is included; and inserting the first element selected in the selecting step into the second structured document at the location designated by the second designation information for designating the location into which the first element is to be inserted.
17. The medium according to claim 13 , wherein the selecting step includes a step of selecting the first element in the first structured document in accordance with element names included in the first designation information.