Method and system for compressing structured descriptions of documents

A decoding method for at least partially decode a binary stream encoding a structured document having a structure defined in at least a first schema not accessible to the decoder and resulting from a change of at least a second schema accessible to the decoder, a structured document comprising information elements nested in each other, the information elements of the document being associated in at least a first and a second schemas with respective element types each defining the respective element structures of the information elements, the first schema being not accessible to a decoder and the second schema being accessible to the decoder, the first schema defining at least one derived information element which is derived from a corresponding element defined in the second schema,

• the decoding method comprising the steps of:
• sequentially reading a binary stream encoding the structured document using the second schema so as to detect in the binary stream binary sequences encoding each information element of the document,
• detecting in a each detected binary sequence of an encoded information element a reference to the first schema, as defined in a schema reference list known by the decoder,
• if such a reference to the first schema is not detected in the detected binary sequence, decoding said detected binary sequence according to the structure defined in the second schema of the information element encoded into said detected binary sequence, and
• if such a reference to the first schema is detected in the detected binary sequence, identifying from the detected reference to the first schema binary data encoding an information element of the structured document having a structure defined in said first schema, and skipping said identified binary data during the sequential reading of said binary stream.