1. A method for improving functionality of a binary representation of an XML-based content description, wherein a structure of any instance of an XML document corresponds to a tree-like data structure, the method comprising the steps of: providing that each tree node represents an element of the content description and has a structure which is defined in a schema; providing the tree nodes in the binary representation with tree branch codes; providing that the respective tree branch code has a schema branch code; and decoding, via a decoder, paths with new elements, which does not conform to a previous schema, by communicating to the decoder one of (a) the associated tree structure nodes beforehand, and (b) a completely new schema.