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diff --git a/schemas/relaxng/router-certificate-schema.rnc b/schemas/relaxng/router-certificate-schema.rnc
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+++ b/schemas/relaxng/router-certificate-schema.rnc
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+# $Id$
+#
+# RelaxNG schema for BGPSEC router certificate interchange format.
+#
+# At least for now, this is a trivial encapsulation of a PKCS #10
+# request, a set (usually containing exactly one member) of autonomous
+# system numbers, and a router-id.  Be warned that this could change
+# radically by the time we have any real operational understanding of
+# how these things will be used, this is just our current best guess
+# to let us move forward on initial coding.
+#
+# Copyright (C) 2014  Dragon Research Labs ("DRL")
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND DRL DISCLAIMS ALL WARRANTIES WITH
+# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+# AND FITNESS.  IN NO EVENT SHALL DRL BE LIABLE FOR ANY SPECIAL, DIRECT,
+# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+# OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+# PERFORMANCE OF THIS SOFTWARE.
+
+default namespace = "http://www.hactrn.net/uris/rpki/router-certificate/"
+
+version         = "1"
+base64		= xsd:base64Binary { maxLength="512000" }
+router_id       = xsd:unsignedInt
+asn_list	= xsd:string       { maxLength="512000" pattern="[0-9][\-,0-9]*" }
+timestamp       = xsd:dateTime { pattern=".*Z" }
+
+# Core payload used in this schema.
+
+payload = (
+  attribute router_id   { router_id },
+  attribute asn         { asn_list },
+  attribute valid_until { timestamp }?,
+  base64
+)
+
+# We allow two forms, one with a wrapper to allow multiple requests in
+# a single file, one without for brevity; the version attribute goes
+# in the outermost element in either case.
+
+start |= element router_certificate_request {
+  attribute version { version },
+  payload
+}
+
+start |= element router_certificate_requests {
+  attribute version { version },
+  element router_certificate_request { payload }*
+}
+
+# Local Variables:
+# indent-tabs-mode: nil
+# comment-start: "# "
+# comment-start-skip: "#[ \t]*"
+# End: