From ITS

Repository of ITS Rules for various XML formats

• Rules for OpenDocument (ODF) 1.0
• Rules for Office Open XML (OOXML) 1.0
• Rules for XHTML 1.1
• Rules for XML Spec
• Rules for DITA
• Rules for Glade XML
• Rules for DocBook
• Rules for POWDER

The ITS test suite contains further examples of ITS rules and local markup.