==================== additional-data-util ==================== In order to be able to extract or attach additional-data.xml files from or to a pdf file the package ships with the command line tool :program:`additional-data-util`. See type *additional_data_util* in your shell for details. extracting embedded files from a pdf ------------------------------------ After installing the additional_data_package, you can extract all embedded files from test.pdf via .. code-block:: shell $ additional_data_util test.pdf To embed an additional_data xml file(adm.xml) that corresponds to xml schema (schema.xsd) into test.pdf type .. code-block:: shell $ additional_data_util test.pdf ad.xml schema.xsd All 3 files must be located in your current working directory. Otherwise use absolute paths in the call.