Advanced Customization > Business Logic Customization > Customizing Business Logic > Customizing Logic for Structure Compare > Changes in Logic from Previous Releases
  
Changes in Logic from Previous Releases
The process for creating custom matching logic for compare applications has changed in Windchill 10.1 M010.
There are four notable changes:
1. Custom matchers no longer implement DSBGraphProcessorDelegate and ApplicationContextChild. Custom matchers only need to extend DSBAbstractMatcher.
2. The method getRootSummaryStatusFlags() has been removed.
3. The methods initRequiredEdgeAttributes() and initRequiredNodeAttributes() have been added.
4. A matcher is now configured to match on one link object type.