Calabash error with p:unwrap? Unwrapping the input's root element doesn't generate an error

Hi Folks,

This p:unwrap step unwraps the root element (BookStore) and thus outputs a sequence:

<p:declare-step xmlns:p="http://www.w3.org/ns/xproc" name="myPipeline">
    <p:input port="source">
        <p:document href="Bookstore.xml"/>
    </p:input>
    <p:output port="result" />
    
    <p:unwrap match="/BookStore" />
    
</p:declare-step>

When I run this using Calabash 0.9.9 I don't get an error message. I believe that I should get an error, right?  Here's what the specification says:

    This step produces a single document; 
    if the document element is unwrapped, 
    the result might not be well-formed XML.

/Roger


Here's Bookstore.xml

<?xml version="1.0"?>
<BookStore>
    <Book>
        <Title>My Life and Times</Title>
        <Author>Paul McCartney</Author>
        <Date>1998</Date>
        <ISBN>1-56592-235-2</ISBN>
        <Publisher>McMillin Publishing</Publisher>
    </Book>
    <Book>
        <Title>Illusions The Adventures of a Reluctant Messiah</Title>
        <Author>Richard Bach</Author>
        <Date>1977</Date>
        <ISBN>0-440-34319-4</ISBN>
        <Publisher>Dell Publishing Co.</Publisher>
    </Book>
    <Book>
        <Title>The First and Last Freedom</Title>
        <Author>J. Krishnamurti</Author>
        <Date>1954</Date>
        <ISBN>0-06-064831-7</ISBN>
        <Publisher>Harper &amp; Row</Publisher>
    </Book>
</BookStore>

Received on Saturday, 9 May 2009 17:07:54 UTC