u | Source driven |
| u | sequence and selection of |
| processing determined by the
| instance |
| u | all information in the source |
| must be handled |
u | Target driven |
| u | sequence and selection of |
| processing is determined by the
| desired results |
| u | Information from multiple |
| locations in the instance can be |
| processed at once |
| u | Existing instances can be |
| enhanced during the process |
| while leaving unknown data |
| untouched |