DESCRIPTIONsgmlcheck is an old and obsoleted form of the SGML source checker command of LinuxDoc-Tools. It is recommended to switch the new form linuxdoc -B check now. It runs an SGML parse on the specified document source. Any errors are reported to standard output. No formatted version of the source is produced.
Note that sgmlcheck preprocesses the LinuxDoc DTD SGML source, doing the conditionalization described by any <#if></#if> and <#unless></#unless> tags. Document sources containing these tags will confuse a standalone SGML parser.