A method and system for converting a document from a clear text representation to a binary representation. There is not a one to one correspondence between the two formats in SPDL. In order to determine what binary representation is needed for a clear text tag which can have a plurality of binary representations,...http://www.google.de/patents/US5504891?utm_source=gb-gplus-sharePatent US5504891 - Method and apparatus for format conversion of a hierarchically structured page description language document