2nd try, this time using XSL and xalan to convert old OO3 files to plain text .notes files.

outline.bash

@@ -0,0 +1,4 @@
+#!/bin/bash
+# TODO copy .gz file based on date
+# TODO gunzip original file
+xalan -xsl outline.xsl -in contents.xml -text

outline.xsl

@@ -0,0 +1,16 @@
+<?xml version="1.0"?>
+<xsl:stylesheet version="1.0"
+                xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+    <xsl:template match="/">
+        <xsl:for-each select="outline/root/item">
+            <xsl:call-template name="item"/>
+        </xsl:for-each>
+    </xsl:template>
+    <xsl:template name="item">
+        <xsl:param name="indent"/>
+        <xsl:value-of select="$indent"/>
+        <xsl:value-of select="values/*[2]/p/run/lit"/>
+        <xsl:text>
+</xsl:text>
+    </xsl:template>
+</xsl:stylesheet>