Methods and systems thereof for processing Extensible Markup Language (XML) documents are described. In one embodiment, an XML document comprising content in an XML format is parsed. The content is converted into pcodes according to a conversion key; that is, an XML tag is converted into a pcode can be converted back to XML using the conversion key. A pcode file including the parsed XML document, converted into pcode, is thereby generated. The pcode file is smaller than the original XML document and the content is already parsed, so the time needed to process the pcode file is significantly less than the time needed to process an XML document. Memory usage and the time needed to send and receive information are also improved.