XSL syntax validation.

[Guest vishwas]

Hi,I want to validate the xsl syntax. I'm using the dom parser as of now and passing the string to it as an InputSource.It is only checking for well formedness but i want it to be checked for validity. Please let me know as to how I could do that.The xsl syntax is as follows:<xsl:stylesheet xmlns:xsl='http://www.w3.org/1999/XSL/Transform' xmlns:otxsl='http://xml.gxs.com/otxsl' version='1.0'><xsl:value-of select='otxsl:errcode()'></xsl:value-of></xsl:stylesheet>The code is as follows: InputSource source = new InputSource(new StringReader(args[0]));DOMParser parser = new DOMParser();parser.parse(source);I have also used the following:DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();// Always turn on namespace awarenessfactory.setNamespaceAware(true);// Turn on validationfactory.setValidating(true);DocumentBuilder parser = factory.newDocumentBuilder();parser.parse(new InputSource(new StringReader(xml)));but none of the above seem to be validating. Please suggest...Thanks in advance,Vishwas.

[Martin Honnen]

If you want to validate any XML document then you first need a schema. I am not sure there is any schema for XSLT 1.0, a schema for XSLT 2.0 exists: http://www.w3.org/2007/schema-for-xslt20.xsd.And, assuming you are using Java to perform the validation then I think the SetValidating method is meant for DTD based validation. If you want to use a schema then you don't need that method, instead you need to use a Schema object. Here is some sample code snippet:

			SchemaFactory xsdFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);			Schema xslt20Schema = xsdFactory.newSchema(new File("W3CXSLT20Schema.xml"));			String sheet = "<xsl:stylesheet xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\" version=\"2.0\">" +						   "  <xsl:ouput method=\"xml\"/>" +						   "  <xsl:template match=\"/\">" +						   "	<xsl:value-of select=\"foo\" separater=\" | \"/>" +						   "  </xsl:template>" +						   "</xsl:stylesheet>";			DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();			docBuilderFactory.setNamespaceAware(true);			docBuilderFactory.setSchema(xslt20Schema);			DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();			docBuilder.setErrorHandler(new ErrorHandler() {				public void error(SAXParseException e) { System.out.println(e.getMessage()); }				public void fatalError(SAXParseException e) { System.out.println(e.getMessage()); }				public void warning(SAXParseException e) {}			});			Document sheetDoc = docBuilder.parse(new InputSource(new StringReader(sheet)));

W3CXSLT20Schema.xml is a local copy of the schema file mentioned above. The sample stylesheet contains two typos resulting in an invalid element named "xsl:ouput" and an invalid attribute named "separater" so the above snippet outputs

cvc-complex-type.2.4.a: Invalid content was found starting with element 'xsl:ouput'. One of '{"http://www.w3.org/1999/XSL/Transform":import, "http://www.w3.org/1999/XSL/Transform":declaration, "http://www.w3.org/1999/XSL/Transform":variable, "http://www.w3.org/1999/XSL/Transform":param, WC[##other:"http://www.w3.org/1999/XSL/Transform"]}' is expected.cvc-complex-type.3.2.2: Attribute 'separater' is not allowed to appear in element 'xsl:value-of'.