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9 changes: 8 additions & 1 deletion docs/static/cross-plugin-concepts.asciidoc
Original file line number Diff line number Diff line change
Expand Up @@ -10,8 +10,15 @@ List-type URI parameters will automatically expand strings that contain multiple
whitespace-delimited URIs into separate entries. This behaviour enables the expansion
of an arbitrary list of URIs from a single Environment- or Keystore-variable.

Examples of plugins and options that support this functionality:
These plugins and options support this functionality:

* <<plugins-inputs-elasticsearch-hosts,Elasticsearch input plugin - `hosts`>>
* <<plugins-outputs-elasticsearch-hosts,Elasticsearch output plugin - `hosts`>>
* <<plugins-filters-elasticsearch-hosts,Elasticsearch filter plugin - `hosts`>>

For example, users use this functionality to define an environment variable with
multiple whitespace-delimited URIs to use it for the options above, e.g.:

```
ES_HOSTS="es1.example.com es2.example.com:9201 es3.example.com:9201"
```