Github user arunmahadevan commented on a diff in the pull request:
https://github.com/apache/storm/pull/1955#discussion_r102639957
--- Diff: docs/index.md ---
@@ -31,6 +28,31 @@ Trident is an alternative interface to Storm. It
provides exactly-once processin
* [Trident spouts](Trident-spouts.html) -- transactional and
non-transactional data intake
* [Trident RAS API](Trident-RAS-API.html) -- using the Resource Aware
Scheduler with Trident.
+#### Streams API
+
+Stream APIs is another alternative interface to Storm. It provides a typed
API for expressing streaming computations and supports functional style
operations.
+
+NOTE: Streams API is an `experimental` feature, and further works might
break backward compatibility.
+We're also noticing it via annotating classes with marker interface
`@InterfaceStability.Unstable`.
+
+* [Streams API](Stream-API.html)
+
+#### SQL
+
+The Storm SQL integration allows users to run SQL queries over streaming
data in Storm.
+
+NOTE: Storm SQL is an `experimental` feature, so the internal of Storm SQL
and supported features are subject to change.
--- End diff --
~~internal~~ internals
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