Unicode compression
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Key: LUCENE-1799
URL: https://issues.apache.org/jira/browse/LUCENE-1799
Project: Lucene - Java
Issue Type: New Feature
Components: Store
Affects Versions: 2.4.1
Reporter: DM Smith
Priority: Minor
In lucene-1793, there is the off-topic suggestion to provide compression of
Unicode data. The motivation was a custom encoding in a Russian analyzer. The
original supposition was that it provided a more compact index.
This led to the comment that a different or compressed encoding would be a
generally useful feature.
BOCU-1 was suggested as a possibility. This is a patented algorithm by IBM with
an implementation in ICU. If Lucene provide it's own implementation a freely
avIlable, royalty-free license would need to be obtained.
SCSU is another Unicode compression algorithm that could be used.
An advantage of these methods is that they work on the whole of Unicode. If
that is not needed an encoding such as iso8859-1 (or whatever covers the input)
could be used.
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