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update readme

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Shay Banon 2012-03-07 21:56:48 +02:00
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README.md
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@ -69,4 +69,11 @@ Both the meta data and the actual content are simple core type mappers (string,
In the above example, the actual content indexed is mapped under `fields` name `file`, and we decide not to index it, so it will only be available in the `_all` field. The other fields map to their respective metadata names, but there is no need to specify the `type` (like `string` or `date`) since it is already known.
Indexed Characters
------------------
By default, `100000` characters are extracted when indexing the content. This default value can be changed by setting the `index.mapping.attachment.indexed_chars` setting. It can also be provided on a per document indexed using the `_indexed_chars` parameter. `-1` can be set to extract all text, but note that all the text needs to be allowed to be represented in memory.
Note, this feature is support since `1.3.0` version.
The plugin uses [Apache Tika](http://lucene.apache.org/tika/) to parse attachments, so many formats are supported, listed [here](http://lucene.apache.org/tika/0.10/formats.html).