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Sources 
With this function, you can record a source and an additional note for a data record, that is a value assignment instance, in value assignment.
You can import sources into the SAP system (see Import and Export).
You can edit sources in source management.
Additional information can be displayed for each source, for example:
· Type and description of source
· Author
· Date of publication
· Order number
· General note on the source itself
To assign a source, proceed as follows:
...
1. Follow the procedure Editing Value Assignments.
2. Choose the Sources tab page.
3. If you want to edit the source of a value assignment instance other than the one displayed, select the required value assignment instance using one of the following methods:
¡ Enter the sort sequence of the value assignment instance in the Sequence field and confirm your entries.
¡ On the Value Assignments tab page, select the value assignment instance and choose the Sources tab page again.
4. Enter data as required and save your entries.
