1. A method for encoding insignificant white space of eXtensible Markup Language (XML) data, the method comprising: identifying an occurrence of insignificant white space in the XML data; generating encoded data to represent the occurrence of insignificant white space, wherein the encoded data includes one or more opcodes and one or more corresponding operands, wherein the encoded data does not include the insignificant white space whose occurrence the encoded data represents; reconstructing a version of the XML data that includes the occurrence of the insignificant white space based on (a) the encoded data, and (b) information that represents the XML data without the insignificant white space; and wherein the method is performed by one or more computing devices.