Following is the resolution from action 142 An errata document accompaniment to the DFDL 1.0 specification is under production and this will be added to it. Regards Steve Hanson Architect, Data Format Description Language (DFDL) Co-Chair, OGF DFDL Working Group IBM SWG, Hursley, UK smh@uk.ibm.com tel:+44-1962-815848 ----- Forwarded by Steve Hanson/UK/IBM on 05/07/2011 18:51 ----- 9.2. Grammar. Does not allow for a prefix length itself having a prefixed length, so does not match property description (ie, the change to permit this is draft 045 omitted to update the grammar). Proposed change to grammar in 9.2: PrefixLength = SimpleContent | PrefixPrefixLength SimpleContent PrefixPrefixLength = SimpleContent This is sufficient to allow the grammar to describe the needed “one more level” of prefix (as required for modeling an ASN.1 format) without allowing recursion. Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU