xs:unsignedLong , xs:unsignedInt , xs:unsignedShort 和xs:unsignedByte .

xs:unsignedLong:无符号长整型，数值介于0到18446744073709551615
xs:unsignedInt:无符号整型，数值介于0到4294967295
xs:unsignedShort：数值介于0到65535
xs:unsignedByte：数值介于0到255