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You can help in this effort when you file new cases with the correct Component and Label or when you search for some cases and see there are not labeled.
Here is a list of Components followed by some conventions:
Conventions for Steps, Job Entries and Databases
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Conventions for 3rd party Applications (e.g. ERP, CRM), Information Quality and other 3rd party vendor labels
Just Select the appropriate component and use the most common name, e.g. OpenERP. When there are spaces in the name, use underscores between the words, e.g. Human_Inference
Conventions for Concepts / Solutions
All other Components
Normally you do not need a label for the other components. They are like the parts of Pentaho Data Integration like Spoon, Pan etc. and do not need further fine graned grouping.