Metadata, Default Values and Required Columns
To improve the quality of metadata associated with documents it is advisable to make columns required:
When applied to “Choice” types, the first choice from the list is automatically selected. Thus the user is not forced to make a choice, and the likelyhood is that the correct value will not be selected.
To circumvent this problem you can set a calculated default value that sets an empty string as the default value. This is an equal sign followed by two double quotes:
Now, when a new item using this field is presented to the user a blank item is selected. If the item is added without supplying a value an error is presented:
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