| 摘要 |
Breakpoints are set in a data schema mapping editor that has an expandable view of model objects. A vertical ruler is provided adjacent to the expandable view for setting breakpoints for the model objects. If the expandable view is manipulated or if a scroll bar is adjusted, the breakpoints will be reset along the vertical ruler as needed. In addition, identifiers will be assigned to each breakpoint based on their associated model objects. The identifiers will also be reassigned, as necessary, to accommodate the addition or deletion of model objects from the expandable view. A "recovery" mechanism also determines when a new model object is actually a previously deleted model object.
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