Re: Parsing XML Schema

[Maksym Kovalenko]

You forgot that parser casted to PSVIProvider is still a parser, so you it for parsing first of all :-) http://xml.apache.org/xerces2-j/faq-xs.html#faq-6 Here's excerpt Within the scope of the methods handling the start and end of an element, i.e. org.xml.sax.ContentHandler.startElement (..), an application can use the PSVIProvider to retrieve the PSVI related to that element and its attributes. You should use parser for parsing, and within content handler methods use parser casted to PSVIProvider to extract PSVI info (as xni faq #6 says) Huzefa Hakimi wrote: This faq page does not tell how to proceed further. As in there it says that you get PSVIProvider instance (by casting SAXParser) but than how do tell after that which is the document to be parsed. Lets for example prv. if one uses this code to parse the Document validated against a schema: reader = XMLReaderFactory.createXMLReader(vendorClass); // register content handler reader.setContentHandler(contentHandler); // register error handler reader.setErrorHandler(errHandler); // set the corresponding features of the SAX parser reader.setFeature("http://xml.org/sax/features/namespaces", true); reader.setFeature("http://xml.org/sax/features/namespace-prefixes", true); reader.setFeature("http://xml.org/sax/features/validation", true); reader.setFeature("http://apache.org/xml/features/validation/schema", true); // create input source from xml document InputSource inputSource = new InputSource(xmlURI); reader.parse(inputSource); ...... Later for this code if one tries to retrieve Schema Information than would be using PSVI to get handler to XSModel. Right? So for this he would have something similar to: .... SAXParserFactory factory = new org.apache.xerces.jaxp.SAXParserFactoryImpl(); factory.setFeature("http://xml.org/sax/features/namespaces", true); factory.setFeature("http://xml.org/sax/features/namespace-prefixes", true); factory.setFeature("http://xml.org/sax/features/validation", true); factory.setFeature("http://apache.org/xml/features/validation/schema", true); SAXParser parser = factory.newSAXParser(); PSVIProvider psvi = (PSVIProvider)parser; But ones he cast parser to PSVIProvider how to proceed from here to next stage so that he can specify the document to be parsed and correspondingly get the Schema Information too. Sorry for this niche queries. Huzefa --- Maksym Kovalenko <[EMAIL PROTECTED]> wrote: http://xml.apache.org/xerces2-j/faq-xs.html Huzefa Hakimi wrote: Hello everybody, Sorry if this has been covered in previous threads. I am trying to gather information about all element ans its type for XML Schema against which XML Document is validated. I am using SAX parser to parse XML documents as have to walk to large documents. Xerces documentation says that you can use PSVI for this, but was not getting how to proceed further having this PSVIParser instance; import org.apache.xerces.impl.xs.psvi.PSVIProvider; import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; ... SAXParserFactory factory = SAXParserFactory.newInstance(); SAXParser parser = factory.newSAXParser(); PSVIProvider psviProvider = (PSVIProvider)parser; In above where do we really point that which XML document its going to parse. Can you please help in getting proceeded from this step. Thanks in advance Huzefa __________________________________ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- ------------------------------------------------------------------------ Maksym Kovalenko Software Engineer Marketswitch Corporation http://www.marketswitch.com <http://www.marketswitch.com/> 108 Powers Court, Suite 225 Dulles, VA 20166 Phone: +1 (703) 444-6750 ext. 302 Fax: +1 (703) 444-6812 __________________________________ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Maksym Kovalenko Software Engineer Marketswitch Corporation http://www.marketswitch.com 108 Powers Court, Suite 225 Dulles, VA 20166 Phone: +1 (703) 444-6750 ext. 302 Fax: +1 (703) 444-6812