Syntax
where are the names of data-carriers, or bases
containing data-carriers.
The XDATA: command is used to delete data. Data is deleted on
the quantities given as the arguments following the command. The list of
arguments can include bases. If so, all data-carriers included in the
base have their data deleted. See §6.2 for details of
specifying collections for the definition part.
Where all data on specifically a data-element is deleted, the
data-element is also deleted. Otherwise, where the data-carrier is an
element, only the data portion only is deleted.
Data defined using the FACTOR: command is also deleted.
If you delete a data carrier which has been associated with an index via
the INDEXVEC: command, the index is also deleted. A warning is
printed.