127         describe: 'set output format backend',  property
132         describe: 'document type to use when converting document',  property
137         describe: 'output file (default: based on path of input file) use \'\' to output to STDOUT',  property
142 …describe: 'set safe mode level explicitly, disables potentially dangerous macros in source files, …  property
147         describe: 'suppress enclosing document structure and output an embedded document',  property
152         describe: 'suppress enclosing document structure and output an embedded document',  property
164 …describe: 'base directory containing the document and resources (default: directory of source file…  property
170         describe: 'destination output directory (default: directory of source file)',  property
204 …describe: 'a directory containing custom converter templates that override the built-in converter …  property
209         describe: 'template engine to use for the custom converter templates',  property
215         describe: 'a document attribute to set in the form of key, key! or key=value pair',  property
221 …describe: 'require the specified library before executing the processor, using the standard Node r…  property
233         describe: `print a help message  property