The W3C has opened public-schemata-users, a mailing list "for discussions between users/writers of schemata in any language (W3 XML Schema, RelaxNG, for example); in particular authors of modular and reusable schemata. Discussion of ways to combine schemata produced by different groups (such as NVDL), authoring best practices, and practical aspects such as level of support in different tools, are all on topic." Subscribe by sending a blank email to public-schemata-users-request@w3c.org.