Data API prep

Author: RichardSmedley

home/modules/ROOT/pages/sdk.adoc

@@ -105,6 +105,14 @@ They offer traditional synchronous APIs as well as scalable asynchronous APIs to
 |===
 
 
+////
+=== Alternatives to SDKs
+
+The Data API gives access to data in Capella Operational clusters --
+for when to use the Data API, or Capella's other REST APIs, see xref:cloud:data-api-guide:data-api-sdks.adoc[].
+////
+
+
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