Suman et al, I got inspired by your XML Schema for DFDL annotations. 1) I fixed a few things in it. It is attached. I renamed it with suffix to make it "...033-1.xsd" You can diff it against yours to find the changes. Some are: no 'all' groups. Added dfdl:simpleType (which I think we forgot, but we need.) took separator props off element and simple type, a few other cleanups. These are a start on the version 034 changes. Then I really got going.... 2) I created an XML Schema for the DFDL subset of XML Schema There is this XML Schema for XML Schema around. I subsetted it to match the DFDL spec. If you use this and your DFDL annotation schema together, under Eclipse, it's really quite a reasonably electric DFDL environment. I have a test file that uses all the annotations I could think of. So I've attached 3 files: DFDL_v1_033-1.xsd - updated DFDL annotations schema DFDLSubsetOfXMLSchema_v1_034.xsd - schema for DFDL subset of XSD strictDFDLChecking.xml - example The example is a bit tricky with the namespace prefixes - it defines the "xsd" prefix to be the DFDLSubset schema, not the ordinary XSD schema. Anyway, I hope this contribution is helpful. It was kind of fun to do. ...mike P.S., somewhere in the various archive files is a stylesheet that turns short-form annotations on DFDL schemas into the longer form annotations. I can dig this out if it is of interest. Mike Beckerle | OGF DFDL WG Co-Chair | CTO | Oco, Inc. Tel: 781-810-2125 | 100 Fifth Ave., 4th Floor, Waltham MA 02451 | <mailto:mbeckerle.dfdl@gmail.com> mbeckerle.dfdl@gmail.com