XPath expression help

Question

I have an xml structure (see XML at bottom) which i want to traverse using the xpath (PL/SQL) utility.
I have written code that mainly uses xpath.selectNodes(...,...)
I can select the customers easily by using
xpath.selectNodes(...,'//customers_item')
FOR i IN 1..NVL(xmldom.getlength(lov_customers),0) LOOP
END LOOP;
but what I want is to get the products for EACH customer.
What I have inside the FOR LOOP is this
xpath.selectNodes(ip_xml_dom, '//customers_item/products/product');
but this gives me all products for all customers not the current customer.
I know if that if I put the correct sytax in the XPath expression I can get what I want?
I can't work this out, can anyone help
<GetProfileResponse>
<Return>
<site>
<customers>
<customers_item>
<id>1<id>
<products>
<product>
<prodid>100</prodid>
</product>
<product>
<prodid>101</prodid>
</product>
</products>
</customers_item>
<customers_item>
<id>2<id>
<products>
<product>
<prodid>102</prodid>
</product>
<product>
<prodid>103</prodid>
</product>
</products>
</customers_item>
</customers>
</site>
</Return>
</GetProfileResponse>
null

Answer 1

The following code works fine for me using PLSQL XML Parser 1.0.2 in Oracle8i 8.1.6 and produces the output:
Customer id:1
--> Prod id:100
--> Prod id:101
Customer id:2
--> Prod id:102
--> Prod id:103
SET SERVEROUTPUT ON
DECLARE
xml VARCHAR2(2000) :=
'<GetProfileResponse>
<Return>
<site>
<customers>
<customers_item>
<id>1</id>
<products>
<product>
<prodid>100</prodid>
</product>
<product>
<prodid>101</prodid>
</product>
</products>
</customers_item>
<customers_item>
<id>2</id>
<products>
<product>
<prodid>102</prodid>
</product>
<product>
<prodid>103</prodid>
</product>
</products>
</customers_item>
</customers>
</site>
</Return>
</GetProfileResponse>';
p xmlparser.parser;
d xmldom.DOMDocument;
n xmldom.DOMNode;
nl_outer xmldom.DOMNodeList;
ct_outer NUMBER;
nl_inner xmldom.DOMNodeList;
ct_inner NUMBER;
xpCusts VARCHAR2(80);
xpProds VARCHAR2(80);
BEGIN
xpCusts := '/GetProfileResponse/Return/site/customers/customers_item';
xpProds := './/products/product';
p := xmlparser.newparser();
xmlparser.parseBuffer(p,xml);
d := xmlparser.getDocument(p);
n := xmldom.makeNode(d);
nl_outer := xslprocessor.selectNodes(n,xpCusts);
ct_outer := xmldom.getLength(nl_outer);
FOR i IN 0..ct_outer-1 LOOP
n := xmldom.item(nl_outer,i);
dbms_output.put_line('Customer id:'&#0124; &#0124;xslprocessor.valueOf(n,'id'));
nl_inner := xslprocessor.selectNodes(n,xpProds);
ct_inner := xmldom.getLength(nl_outer);
FOR j IN 0..ct_inner-1 LOOP
n := xmldom.item(nl_inner,j);
dbms_output.put_line('--> Prod id:'&#0124; &#0124;xslprocessor.valueOf(n,'prodid'));
END LOOP;
END LOOP;
xmldom.freeDocument(d);
xmlparser.freeparser(p);
END;
/