BIND 10 #20: review Element class

[BIND 10 Development]

#20: review Element class
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 Reporter:  jelte                       |        Owner:  jelte                                                
     Type:  task                        |       Status:  assigned                                             
 Priority:  major                       |    Milestone:  01. Running, non-functional authoritative-only server
Component:  Inter-module communication  |   Resolution:                                                       
 Keywords:  ccapi                       |    Sensitive:  0                                                    
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Comment(by jelte):

 Not sure what to do about the factories, thinking of simply removing the
 catches there.

 Other comment is closely related to whether and when we want to use json
 instead of isc::data (which needs to be renamed if not removed). But I
 think we should defer that to another ticket and call this one done (minus
 the removal of those catches, which is a pretty simple task that I can do
 later today.

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Ticket URL: <http://bind10.isc.org/ticket/20#comment:8>
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