Imported DocBook stylesheet location for XSQL Page

Question

Hi all,
I've got the following XSQL page which queries a DocBook document stored in XMLDB as a schema-based CLOB.
<?xml version = '1.0' encoding = 'UTF-8'?>
<!--
| Uncomment the following processing instruction and replace
| the stylesheet name to transform output of your XSQL Page using XSLT
<?xml-stylesheet type="text/xsl" href="YourStylesheet.xsl" ?>
-->
<page xmlns:xsql="urn:oracle-xsql" connection="jdbc/DBConnection1DS">
<xsql:query max-rows="1" null-indicator="yes" tag-case="lower">
SELECT extractValue(x.DOCBOOKS_DOC, '/book/part/title', 'xmlns="http://docbook.org/ns/docbook"') "BOOK_TITLE",
extract(x.DOCBOOKS_DOC, '/book/part/chapter/sect1/sect2', 'xmlns="http://docbook.org/ns/docbook"').getStringVal() "BOOK_CONTENT"
FROM DOCBOOKS_STORE x</xsql:query>
</page>
Which outputs the following:
<!--
| Uncomment the following processing instruction and replace
| the stylesheet name to transform output of your XSQL Page using XSLT
<?xml-stylesheet type="text/xsl" href="YourStylesheet.xsl" ?>
-->
     <page>
     <rowset>
     <row num="1">
<book_title>
This is a test string
</book_title>
     <book_content>
<sect2 xmlns="http://docbook.org/ns/docbook"><title>
This is sect2/title test text.
</title><para>
This is sect2/para test text.
</para></sect2>
</book_content>
</row>
</rowset>
</page>
The query runs fine (thanks to help from the XML DB forum). I'm now trying to use the docbook.xsl HTML stylesheet but I'm not sure of the following:
1) Where do imported stylesheets need to be stored for the XLST processor to find them and can we change the default location (DocBooks has loads of associated stylesheet includes)? I've tried several locations and corresponding hrefs but nothing seems to work.
2) Since the output contains a mixture of both DocBook and non-DocBook tags, I'm guessing/hoping that the XLST processor can parse the string extract and all what I would need to do is use is the <xsl:import/> and <xsl:apply-import/>. Is this correct?
Many thanks in advance.
George.

Answer 1

Just closing the loop on this one...
1) After more trial and error, I found that the XLST stylesheet need to be in the same location as the *.xsql page. To check, I wrote a simple XLST to output HTML rather than confuse the issue with applying the docbook imported stylesheets. This worked as expected with the resulting HTML output, bar the fact that I now have a security issue with my stylesheet sitting in the /PUBLIC_HTML folder. For the moment this is OK since the application is for internal prototyping purposes.
2) If I want the XLST processor to parse the underlying XML tags, then the data needs to be returned as XMLType and not a VARCHAR2 string which my <xsl:query extract().getStringVal())> does.
Unfortunately I now have an enviromental problem retrieving XMLType data through my XSQL query. I believe this has something to do with my JDBC driver and/or missing libraries.
Cheers