Author: mukulg
Date: Sun May 30 05:22:17 2010
New Revision: 949478
URL: http://svn.apache.org/viewvc?rev=949478&view=rev
Log:
adding faq information, for XPath 2.0 support in Xerces-J 2.10.0 release
Modified:
xerces/java/branches/xml-schema-1.1-dev/docs/faq-xs.xml
Modified: xerces/java/branches/xml-schema-1.1-dev/docs/faq-xs.xml
URL:
http://svn.apache.org/viewvc/xerces/java/branches/xml-schema-1.1-dev/docs/faq-xs.xml?rev=949478&r1=949477&r2=949478&view=diff
==============================================================================
--- xerces/java/branches/xml-schema-1.1-dev/docs/faq-xs.xml (original)
+++ xerces/java/branches/xml-schema-1.1-dev/docs/faq-xs.xml Sun May 30 05:22:17
2010
@@ -65,7 +65,37 @@ v.validate(new StreamSource(args[0]));
</a>
</faq>
-
+ <faq title="XPath 2.0 support for XML Schema 1.1 validation">
+ <q>How Xerces-J uses an XPath 2.0 engine, for XML Schema 1.1 assertions
and type-alternatives?</q>
+ <a>
+ <p>XML Schema 1.1 'assertions' and 'type-alternatives' requires an
<jump href="http://www.w3.org/TR/xpath20/";>XPath 2.0</jump>
+ processor for evaluation.
+ For XSD 1.1 assertions, a full XPath 2.0 support is mandatory to
use. For XSD 1.1 type-alternatives,
+ XML schema engines can provide full XPath 2.0 support or, can
implement a smaller XPath 2.0 subset, as
+ defined by the XSD 1.1 language.
+ For type-alternatives implementation, Xerces first attempts to
compile the XPath expression with a
+ native Xerces "XPath subset" parser.
+ If parsing with the native Xerces "XPath subset" parser fails,
Xerces transparently switches to full XPath 2.0 parsing
+ and evaluation. Using the native Xerces "XPath subset" parsing for
type-alternatives is likely to be efficient, than full XPath 2.0
+ evaluation, in many cases.
+ For full XPath 2.0 evaluation (for XSD 1.1 'assertions', and
optionally for 'type-alternatives'),
+ Xerces uses the <jump
href="http://wiki.eclipse.org/PsychoPathXPathProcessor";>Eclipse/PsychoPath
XPath 2.0 engine</jump>.
+ </p>
+ <p>
+ Xerces-J bundles a JDK 1.3 compliant PsychoPath XPath 2.0 JAR. This
has somewhat less XPath 2.0 language
+ compliance for W3C XPath 2.0 language. For a better XPath 2.0 build,
for using with Xerces XML Schema 1.1
+ processing, users may choose to download the latest PsychoPath JAR
from following locations:
+ </p>
+ <ul>
+ <li><jump href="http://www.eclipse.org/webtools/";>Eclipse Web
Tools Platform (WTP) Project</jump></li>
+ <li><jump
href="https://build.eclipse.org/hudson/view/WTP/job/cbi-wtp-wst.xsl.psychopath/";>Eclipse/PsychoPath
continuous build server</jump>.
+ The most latest successful PsychoPath developer build could be
downloaded from here.</li>
+ </ul>
+ <p>
+ The latest PsychoPath XPath 2.0 engine builds at Eclipse, require a
minimum JDK level of 1.5.
+ </p>
+ </a>
+ </faq>
<faq title="Using Entities and CDATA Sections">
<q>How does the XML Schema processor treat entities and CDATA sections?</q>
<a>
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