Output of pxp:nvdl with errors

pxp:nvdl output

<?xml version="1.0" encoding="UTF-8"?>
<p:declare-step version='1.0' name="main"
    xmlns:p="http://www.w3.org/ns/xproc"
    xmlns:pxp="http://exproc.org/proposed/steps"
    xmlns:ex="http://xproc.org/ns/xproc/ex">
    
    <!-- Always include this to ward off evil -->
    <p:import href="http://xmlcalabash.com/extension/steps/library-1.0.xpl"/>
    
    <p:input port="source">
        <p:inline>
            <chapterx xmlns="http://docbook.org/ns/docbook" xml:id="chapter-0" version="5.0">
                <title>Ipsum Lorem</title>
                <section xml:id="section-1">
                    <title>Test case: multiple arch attribute3</title>
                    <orderedlist>
                        <listitem>
                            <para>the first item has no arch or role attribute set</para>
                        </listitem>
                    </orderedlist>
                </section>
            </chapterx>
        </p:inline>
    </p:input>
    <p:output port="result"/>
    
    <p:try>
        <p:group>
            <pxp:nvdl assert-valid="true">
                <p:input port="nvdl">
                    <p:document href="/Users/dcramer/test/segbook.nvdl"/>
                </p:input>
                <p:input port="schemas">
                    <p:empty/>
                </p:input>
            </pxp:nvdl>
        </p:group>
        <p:catch name="catch">
            <p:identity>
                <p:input port="source">
                    <p:pipe step="catch" port="error"/>
                </p:input>
            </p:identity>
        </p:catch>
    </p:try>

</p:declare-step>


dcramer@anatine-3 ~/Downloads/1.1.27-99
$ java -jar xmlcalabash-1.1.27-99.jar ~/Downloads/test.xpl
/Users/dcramer/Downloads/test.xpl:2:179: error: element "chapterx" not allowed anywhere; expected element "acknowledgements", "appendix", "article", "bibliography", "book", "caution", "chapter", "colophon", "computeroutput", "dedication", "example", "figure", "formalpara", "glossary", "glossentry", "important", "index", "informalexample", "informalfigure", "informaltable", "inlinemediaobject", "itemizedlist", "legalnotice", "listitem", "member", "note", "ns:include", "orderedlist", "para", "part", "phrase", "preface", "procedure", "programlisting", "qandaentry", "refentry", "reference", "refsect2", "refsect3", "refsection", "row", "screenshot", "sect2", "sect3", "sect4", "sect5", "section", "set", "setindex", "simpara", "simplelist", "step", "table", "tip", "toc", "variablelist", "varlistentry" or "warning" (with xmlns:ns="http://www.w3.org/2001/XInclude")
/Users/dcramer/Downloads/test.xpl:3:43: error: element "chapterx" not allowed anywhere; expected element "acknowledgements", "appendix", "article", "bibliography", "book", "caution", "chapter", "colophon", "computeroutput", "dedication", "example", "figure", "formalpara", "glossary", "glossentry", "important", "index", "informalexample", "informalfigure", "informaltable", "inlinemediaobject", "itemizedlist", "legalnotice", "listitem", "member", "note", "ns:include", "orderedlist", "para", "part", "phrase", "preface", "procedure", "programlisting", "qandaentry", "refentry", "reference", "refsect2", "refsect3", "refsection", "row", "screenshot", "sect2", "sect3", "sect4", "sect5", "section", "set", "setindex", "simpara", "simplelist", "step", "table", "tip", "toc", "variablelist", "varlistentry" or "warning" (with xmlns:ns="http://www.w3.org/2001/XInclude")
/Users/dcramer/Downloads/test.xpl:11:27: error: element "chapterx" not allowed anywhere; expected element "acknowledgements", "appendix", "article", "bibliography", "book", "caution", "chapter", "colophon", "computeroutput", "dedication", "example", "figure", "formalpara", "glossary", "glossentry", "important", "index", "informalexample", "informalfigure", "informaltable", "inlinemediaobject", "itemizedlist", "legalnotice", "listitem", "member", "note", "ns:include", "orderedlist", "para", "part", "phrase", "preface", "procedure", "programlisting", "qandaentry", "refentry", "reference", "refsect2", "refsect3", "refsection", "row", "screenshot", "sect2", "sect3", "sect4", "sect5", "section", "set", "setindex", "simpara", "simplelist", "step", "table", "tip", "toc", "variablelist", "varlistentry" or "warning" (with xmlns:ns="http://www.w3.org/2001/XInclude")
<c:errors xmlns:c="http://www.w3.org/ns/xproc-step"><c:error xmlns:err="http://www.w3.org/ns/xproc-error" code="err:XC0053" href="file:/Users/dcramer/Downloads/test.xpl" line="5" column="45">XC0053</c:error></c:errors>