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The following page has been changed by KelvinGoodson:
http://wiki.apache.org/ws/Tuscany/TuscanyJava/Design/SDO/ChangeSummary

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  == Existing Patterns ==
  === The "mixed" approach ===
  Assuming that consistency of approach is a good place to start from, it would 
be sensible to follow the pattern of the inclusion of the mixed feature as a 
property of a class which occurs when mixed = true.  Finding this feature is 
based on annotation of the feature with a FEATURE_KIND, i.e. for the mixed 
feature this is ExtendedMetaData.ELEMENT_WILDCARD_FEATURE.
+ 
+ '''However''' the spec says that the trigger for ChangeSummary on a DO is the 
presence of a Property of type commonj.sdo.ChangeSummaryType in the type,  and 
there are lots of sensible coinstraints on that Property that make this 
approach workable,  so the above is probably redundant if not completely wrong.
  
  ==== Issues/Things I can see that would need to be done ====
   * meta model

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