I would like to know whether a data item created in OMW can be deleted.
There are multiple ways to delete a data item created in OMW. Yes you can delete it. What you have to be careful about is that no applications are accessing it, and you have to re-generate your data dictionary tables.
Data items created by users can be deleted from dd. but before deleting please consider the impact on all applications referring to the data item.
*Questions excerpted from ITToolBox.com*
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