[XQueryX] XQueryX schema and JSR 101 optional elements

JSR 101 ( http://www.jcp.org/en/jsr/detail?id=101 ) for JAX RPC lists some 
elements from W3C schema as optional such as group, choice. They are being 
used in XQueryX schema.
Not all vendors have implemented optional elements and are still JAX RCP 
compliant.
(IBM WebSphere, BEA Weblogic). Apache Axis does have support for optional 
elements.
Is there plan to remove use of group, choice from the XQueryX schema?

Sincerely,

Benjamin.

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