[Xerces Wiki] Update of "XML Schema 1.1 Assertions" by assertions

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The following page has been changed by assertions:
http://wiki.apache.org/xerces/XML_Schema_1%2e1_Assertions

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   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'''.
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- '''Acknowledgements'''
- 
- Along with me, the following people have contributed to implementation of assertions feature in Xerces-J.
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-  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 along with me for the PsychoPath processor.
-  1. ''Andrea Bittau (and team):'' For developing the PsychoPath XPath 2.0 engine, and donating to Eclipse.
- 
- My sincere thanks to all of the above colleagues for making this possible.    
  
  
  '''References:'''

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