SyncroSoft has released version 6.0 of the <Oxygen/> XML editor. Oxygen supports XML, XSL, DTDs, XQuery, SVG, Relax NG, Scehmatron, and the W3C XML Schema Language. New features in version 6.0 include a visual schema editor, diff and merge, and database import. Oxygen costs $196 with support. Upgrades are $115.