This program create a DTD grammar from an XML file. Simply call this program with proper arguments and it will generate a new file with the appropriate syntax. Keep in mind that it can't understand the type of each tag. Defaults are CDATA, so you could have to manually modify those.
DTDautosyntax -i filein.xml -o fileout.dtd to convert filein.xml into fileout.xsd if a field is not specified
DTDautosyntax -i filein.xml -o fileout.dtd --force-ofile-name to force the name
DTDautosyntax -i filein.xml to convert filein.xml into schema.xsd
DTDautosyntax -i filein.xml -c to convert filein.xml to stdout
DTDautosyntax -i filein.xml -o fileout.dtd -s to convert filein.xml into fileout.xsd if a field is not specified and hide the suggestion for the linking to the xml file
-i, --ifile <file> the input file. MUST be specified
-o, --ofile <file> the output file. Is overriden by the field in the XML file if specified. Defaults to schema.dtd
-c, --console write on stdout instead than on the specified file.
--force-ofile-name Avoid the override of the output file name by the field on the XML. A file output must be present for this
--force-dtd-type <type> force the use of a specific type for the type attribute. Defaults at "CDATA". BE CAREFUL no type check is done on this
-s, --hide-suggestion hide the suggestion for the header to link the DTD file to the XML
-h, --help display this useful help
-l Shows the license
#############################################################
# #
# This program is relased in the GNU GPL v3.0 license #
# you can modify/use this program as you wish. Please #
# link the original distribution of this software. If #
# you plan to redistribute your modified/copied copy #
# you need to relased the in GNU GPL v3.0 licence too #
# according to the overmentioned licence. #
# #
# "PROUDLY" MADE BY chkrr00k (i'm not THAT proud tbh) #
# #
#############################################################
# #
# #
# YEE #
# #
# #
#############################################################