This program create am XSD 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 xs:types of each tag. Defaults are xs:string, so you could have to manually modify those.
XSDautosyntax -i filein.xml -o fileout.xsd to convert filein.xml into fileout.xsd if a field is not specified
XSDautosyntax -i filein.xml -o fileout.xsd --force-ofile-name to force the name
XSDautosyntax -i filein.xml to convert filein.xml into schema.xsd
XSDautosyntax -i filein.xml -c to convert filein.xml to stdout
-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.xsd
-e, --xml-encoding <format> the encoding formato of the xsd file. Defaults at "utf-8"
-v, --xml-version <version> the version of the xsd file. Defaults at "1.0"
-s, --xsd-schema-url <url> the xsd schema url. Defaults at http://www.w3.org/2001/XMLSchema
-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-xs-type <type> force the use of a specific type for the type attribute. Defaults at "xs:string". BE CAREFUL no type check is done on this
--force-inline forces the use of inlines instead of the creation of subtypes. DO NOT USE AS IT CAN PRODUCE WRONG OUTPUTS, IT ALSO DOESN'T PRODUCE APPROPRIATE ATTRIBUTES SUPPORT AND MIXED ATTRIBUTES
-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 #
# #
# #
#############################################################