Thank You so much, u r right the namespace is the problem! Thanx!! Swapna
-----Original Message----- From: Vadim Gritsenko [mailto:[EMAIL PROTECTED] Sent: Monday, December 22, 2003 7:42 PM To: [email protected] Subject: Re: using XPath with DOM Swapna Gupta wrote: > Hello, > > Please help me solve my problem, which is thus: > > I am constructing an XML DOM tree and saving it in Xindice as DOM > tree, following is the code snippet for it: > > DOMImplementation domImpl = new DOMImplementationImpl(); > > Document doc = domImpl.createDocument(null, "lesson", null); > > Element root = doc.getDocumentElement(); > > root.setAttribute("xmlns", "http://swel.cs.ua.edu:8080/swapna/lessons";); > > root.setAttribute("xmlns:xsi", > "http://www.w3.org/2001/XMLSchema-instance";); > > root.setAttribute("xsi:schemaLocation"," > http://swel.cs.ua.edu:8080/swapna/lessons E:/SWEL-Shared/tomcat > > server/webapps/useraccounts/swapna/lessons_learned_system/lessons_new.xs d" > ); > > Element titleElement = doc.createElement("title"); > > Text titleText = doc.createTextNode(topic); /*topic contains a string*/ > > titleElement.appendChild(titleText); > > root.appendChild(titleElement); > > ..... > > ..... > > ... > > In the end, after constructing the complete DOM tree, I store it in > Xindice as: > > DatabaseManager.getCollection("xmldb:xindice://swel.cs.ua.edu:4080/db/" > + colName); /*colName contains a String*/ > > XMLResource document = (XMLResource) col.createResource(null, > > "XMLResource"); > > document.setContentAsDOM((Node)doc); > > col.storeResource(document); > > ...... > > Now, I am trying to use XPath to make queries into these documents > stored in Xindice. If I use a query like "/descendant::*", and output > their result using getContent(), I can see all my documents. But, if I > do a query like "/descendant::lesson" (lesson is the root element), > the query finds no matches. On the other hand, if I store my documents > by reading their contents as String from an XML file, I can query them > using XPath correctly. > > Are there any issues associated with using XPath for querying > documents saved as DOM trees using setContentAsDOM() in Xindice? > I think the problem is that your xpath uses default namespace, while in the document you try to use "http://swel.cs.ua.edu:8080/swapna/lessons"; namespace. At least that's how I interpreted your line: root.setAttribute("xmlns", "http://swel.cs.ua.edu:8080/swapna/lessons";); but I think correct way to do it would be to pass it to createDocument: Document doc = domImpl.createDocument("http://swel.cs.ua.edu:8080/swapna/lessons";, "lesson", null); Try this xpath: "/descendant::*:lesson", it should match any namespace. Vadim
