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the first is the Extraction Information logic for the column
the second is the underlying database column reference (ColumnInfo).
If you are ever unsure what a node is you can use the ‘What is this’ function:
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A full list of objects in RDMP is available through the Help=>Show Objects Help menu.
Finally if you are ever confused about the role of a feature or object you can check the Glossary.
In Summary
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