fpclasschart has several options, most of them optional, defaults will be used in most cases.
--input=cmdline
This option tells fpclasschart to generate a tree file. The command line is the same as the
compiler's one used to compile the source file.
--output=filename
This option specifies the name of the generated file descfile that contains the actual chart for
the object tree.
--merge=filename
Gives a path to a file already containing an object tree to merge.
--kind=objectkind
Specifys object kind. One of object, class, interface.
--lang=language
Sets the language for the output file. This will mainly set the strings used for the headers in
various parts of the documentation files (by default they're in english). Currently, valid options
are
de German.
fr French.
nl Dutch.
--help Writes a help message.