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The following page has been changed by assertions: http://wiki.apache.org/xerces/XML_Schema_1%2e1_Assertions ------------------------------------------------------------------------------ A first version of this interface is complete, and we have written sample implementations of this interface for following freely available XPath 2.0 engines: - 1. [http://psychopath.sourceforge.net/ Eclipse XPath2/PsychoPath] + 1. [http://www.eclipse.org/webtools/ Eclipse XPath2/PsychoPath] 1. [http://saxon.sourceforge.net/ Saxon basic] @@ -120, +120 @@ 1. If user's wish to use an XPath 2.0 engine other than PsychoPath or Saxon, for working with Xerces-J assertions, they need to write a custom Java layer similar to org.apache.xerces.impl.xs.XMLAssertPsychopathImpl or org.apache.xerces.impl.xs.XMLAssertSaxonImpl. Xerces-J would publish an API, to integrate to any available standard compliant XPath 2.0 engines. - 1. Xerces-J flags error messages during assertions processing, as recommended by the XML Schema 1.1 specification. If the user provides a syntactically wrong XPath 2.0 expression, the Schema processing terminates, flagging an error message to the user with key, '''cvc-xpath.3.13.4.2'''. If the XPath 2.0 syntax is correct, but any of the assertions evaluate to "false", the Schema processing terminates, and an error message is shown to the user with key, '''cvc-assertion.3.13.4.1'''. + 1. Xerces-J flags error messages during assertions processing, as recommended by the XML Schema 1.1 specification. If the user provides a syntactically wrong XPath 2.0 expression, the Schema processing terminates, flagging an error message to the user with key, '''cvc-xpath.3.13.4.2'''. If the XPath 2.0 syntax is correct, but any of the assertions evaluate to "false", the Schema processing terminates, and an error message is shown to the user with key, '''cvc-assertion.3.13.4.1'''. + + '''Acknowledgements''' + + Along with me, the following people contributed to implementation of assertions feature in Xerces-J. + + 1. ''Khaled Noaman:'' For a detailed review of my work, and pointing numerous improvements to the code. + 1. ''Michael Glavassevich:'' For helping every now and then, advising on the design issues related to assertions development. + 1. ''Ken Cai:'' For defining an interface to the XPath 2.0 engine, and writing an implementation with me for the PsychoPath processor. + 1. ''Andrea Bittau (and team):'' For writing the PsychoPath XPath 2.0 engine, and donating to Eclipse. + + My sincere thanks to all of the above colleagues for making this possible. '''References:''' --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
