This will create a series of output files where the JPG at the end of the filename has been replaced with a PNG, with the associated image formatchange.
这将创建一系列输出文件，这些文件的末尾的jpg将由png所取代，同时伴随着文件格式的改变。
2
The extensibility of the XML is lost, as the entire database design must be redone to accommodate the addition of new elements or a formatchange to any elements.