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Zero Plugin
===========
The ``zero`` plugin allows you to null fields in files' metadata tags. Fields
can be nulled unconditionally or conditioned on a pattern match. For example,
the plugin can strip useless comments like "ripped by MyGreatRipper." This
plugin only affects files' tags; the beets database is unchanged.
To use the plugin, enable it by including ``zero`` in the ``plugins`` line of
your configuration file. To configure the plugin, use a ``zero:`` section in
your configuration file. Set ``fields`` to the (whitespace-separated) list of
fields to change. You can get the list of available fields by running ``beet
fields``. To conditionally filter a field, use ``field: [regexp, regexp]`` to
specify regular expressions.
For example::
zero:
fields: month day genre comments
comments: [EAC, LAME, from.+collection, 'ripped by']
genre: [rnb, 'power metal']
If a custom pattern is not defined for a given field, the field will be nulled
unconditionally.
Note that the plugin currently does not zero fields when importing "as-is".
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