Initial proposal for Issue 4041

Attached is an initial draft proposal for issue 4041 [1], adding  
ignorable in the Primer. Note that this issue did not include adding  
material on ignorable to the Guidelines, which would be related.

This draft does not reflect the full consensus of the editors, since  
not every editor had a chance to review it. However we felt that it  
would be useful to provide to the committee in advance of the F2F to  
show the direction of this work. Additional changes may be needed.

Thanks

regards, Frederick

Frederick Hirsch
Nokia

[1] <http://www.w3.org/Bugs/Public/show_bug.cgi?id=4041>