[EMAIL PROTECTED] wrote on 3/14/18 4:03 PM:

The numeric field types in Lucy have long been a present-but-undocumented
because we've taken a pretty conservative approach to the public API.

https://github.com/apache/lucy/blob/master/core/Lucy/Plan/NumericType.cfh

https://metacpan.org/source/NWELLNHOF/Lucy-0.6.2/lib/Lucy/Plan/Int64Type.pm

The sorting and storing aspects of Lucene field types are present, but as
attributes on the existing field types. See e.g.

https://lucy.apache.org/docs/perl/Lucy/Plan/FieldType.html

If you wanted to implement your own field type, I expect it would depend on what
language implementation you wanted to do it in. In Perl, you could start by
subclassing an existing type and extending it, just as you would any other Perl
class.
--
Peter Karman  .  he/him/his  .  https://karpet.github.io/
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