Why does a comparison on an xsd:dateTime return 0 elements

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I am entering the following XPath: /bks:books/book[date_time < 2000-10-03T01:02:03Z]/author
XML file:
<div style="color:Black;background-color:White; <pre>
<?xml version=<span style="color:#A31515; "1.0" encoding=<span style="color:#A31515; "UTF-8"?>
<bks:books xmlns:bks=<span style="color:#A31515; "urn:books" xmlns:xsi=<span style="color:#A31515; "http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:books
C:testbooks.xsd
<book id=<span style="color:#A31515; "bk101">
<author>Gambardella, Matthew</author>
<title>XML Developers Guide</title>
<genre>Computer</genre>
<price>44.95</price>
<publish_date>2000-10-01</publish_date>
<description>An <span style="color:Blue; in-depth look at creating applications
with XML.</description>
<date_time>2000-10-02T01:02:03Z</date_time>
<time_only>04:05:06</time_only>
</book>
<book id=<span style="color:#A31515; "bk102">
<author>Ralls, Kim</author>
<title>Midnight Rain</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2000-10-03</publish_date>
<description>A former architect battles corporate zombies,
an evil sorceress, and her own childhood to become queen
of the world.</description>
<date_time>2000-10-03T01:02:03Z</date_time>
<time_only>01:02:03</time_only>
</book>
</bks:books>

[/code]
XSD file:
<div style="color:Black;background-color:White; <pre>
<span style="color:Blue; <<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; schema <span style="color:Red; xmlns:xsd<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; http://www.w3.org/2001/XMLSchema<span style="color:Black; " <span style="color:Red; xmlns:bks<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; urn:books<span style="color:Black; " <span style="color:Red; targetNamespace<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; urn:books<span style="color:Black; "<span style="color:Blue; >
<span style="color:Blue; <<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; element <span style="color:Red; name<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; books<span style="color:Black; " <span style="color:Red; type<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; bks:BooksForm<span style="color:Black; "<span style="color:Blue; />
<span style="color:Blue; <<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; complexType <span style="color:Red; name<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; BooksForm<span style="color:Black; "<span style="color:Blue; >
<span style="color:Blue; <<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; sequence<span style="color:Blue; >
<span style="color:Blue; <<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; element <span style="color:Red; name<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; book<span style="color:Black; " <span style="color:Red; type<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; bks:BookForm<span style="color:Black; " <span style="color:Red; minOccurs<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; 0<span style="color:Black; " <span style="color:Red; maxOccurs<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; unbounded<span style="color:Black; "<span style="color:Blue; />
<span style="color:Blue; </<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; sequence<span style="color:Blue; >
<span style="color:Blue; </<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; complexType<span style="color:Blue; >
<span style="color:Blue; <<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; complexType <span style="color:Red; name<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; BookForm<span style="color:Black; "<span style="color:Blue; >
<span style="color:Blue; <<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; sequence<span style="color:Blue; >
<span style="color:Blue; <<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; element <span style="color:Red; name<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; author<span style="color:Black; " <span style="color:Red; type<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; xsd:string<span style="color:Black; "<span style="color:Blue; />
<span style="color:Blue; <<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; element <span style="color:Red; name<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; title<span style="color:Black; " <span style="color:Red; type<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; xsd:string<span style="color:Black; "<span style="color:Blue; />
<span style="color:Blue; <<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; element <span style="color:Red; name<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; genre<span style="color:Black; " <span style="color:Red; type<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; xsd:string<span style="color:Black; "<span style="color:Blue; />
<span style="color:Blue; <<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; element <span style="color:Red; name<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; price<span style="color:Black; " <span style="color:Red; type<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; xsd:float<span style="color:Black; "<span style="color:Blue; />
<span style="color:Blue; <<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; element <span style="color:Red; name<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; publish_date<span style="color:Black; " <span style="color:Red; type<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; xsd:date<span style="color:Black; "<span style="color:Blue; />
<span style="color:Blue; <<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; element <span style="color:Red; name<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; description<span style="color:Black; " <span style="color:Red; type<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; xsd:string<span style="color:Black; "<span style="color:Blue; />
<span style="color:Blue; <<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; element <span style="color:Red; name<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; date_time<span style="color:Black; " <span style="color:Red; type<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; xsd:dateTime<span style="color:Black; "<span style="color:Blue; />
<span style="color:Blue; <<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; element <span style="color:Red; name<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; time_only<span style="color:Black; " <span style="color:Red; type<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; xsd:time<span style="color:Black; "<span style="color:Blue; />
<span style="color:Blue; </<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; sequence<span style="color:Blue; >
<span style="color:Blue; <<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; attribute <span style="color:Red; name<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; id<span style="color:Black; " <span style="color:Red; type<span style="color:Blue; =<span style="color:Black; "<span style="color:Blue; xsd:string<span style="color:Black; "<span style="color:Blue; />
<span style="color:Blue; </<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; complexType<span style="color:Blue; >
<span style="color:Blue; </<span style="color:#A31515; xsd<span style="color:Blue; :<span style="color:#A31515; schema<span style="color:Blue; >

[/code]
And when I call XPathNavigator.Evaluate("/bks:books/book[date_time < 2000-10-03T01:02:03Z]/author", context) I get back an XPathNodeIterator with a Count of 0. Its not giving me an error (which will occur without the XSD as you cant do < on atrings).
I also tried > and that too gave me an error.
??? - thanks - dave <hr class="sig Very funny video - http://blogs.windwardreports.com/davidt/2010/02/reporting-as-a-metaphor.html
Whats your Metaphor?

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