Patrick, The following osisRefs are not valid with the current schema: osisRef="Gen-Rev" osisRef="x:Gen-Rev" The following are valid: osisRef="Gen-Rev.1" osisRef="x:Gen-Rev.1" osisRef="Gen-Rev@s[a]" osisRef="Gen-Rev!a@s[a][2]" osisRef="Gen-Rev!a" At least on "." must be present on the right side of a range ref in the current schema. We should allow reference with no ".". Todd