Added NVDL rules file contributed by George Bina

diff --git a/docbook/relaxng/docbook/docbook.nvdl b/docbook/relaxng/docbook/docbook.nvdl
new file mode 100644 (file)
index 0000000..a3d8730
--- /dev/null
+++ b/docbook/relaxng/docbook/docbook.nvdl
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<rules xmlns="http://purl.oclc.org/dsdl/nvdl/ns/structure/1.0"
+       startMode="docbook">
+
+<mode name="docbook">
+  <namespace ns="http://docbook.org/ns/docbook">
+    <validate schema="rng/docbook.rng" useMode="attach"/>
+    <validate schema="sch/docbook.sch" useMode="attach"/>
+  </namespace>
+</mode>
+
+<mode name="attach">
+  <anyNamespace>
+    <attach/>
+  </anyNamespace>
+</mode>
+
+</rules>