InstanceToSchema is a RELAX NG schema generator from XML instances. It is a command line tool. There is no user interface. It is written in java and needs J2SE 1.3 or 1.4 and a JAXP compliant SAX parser for running.

A typical use case consists to obtain a description of the structure of one or several (combined) XML files. It must be noted that the tool make use of only a little part of the RELAX NG language.