update

Author: ManuelSchneid3r

src/gettingstarted/extension/general.md

@@ -55,6 +55,12 @@ All of them provide instances of the [`Item`](/reference/classalbert_1_1Item.htm
 The `Item` interface provides several methods related to  the features of the user interface, 
 most notably the [`Action`](/reference/classalbert_1_1Action.html) factory.
 
+The `GlobalQueryHandler` implements the `TriggerQueryHandler` interface.
+This is a design decision to simplify the plugin development.
+
+The [`IndexQueryHandler`](/reference/classalbert_1_1IndexQueryHandler.html) implements the `GlobalQueryHandler` interface.
+It serves as a convenience class that performs (fuzzy) matching using a 2-gram index.
+
 Related classes:
 
 - [`Query`](/reference/classalbert_1_1Query.html)
@@ -63,12 +69,10 @@ Related classes:
   Value-based implementation of the `Item` interface.
 - [`RankItem`](/reference/classalbert_1_1RankItem.html)
   Used by `GlobalQueryHandler` to return scored matches.
-- [`IndexQueryHandler`](/reference/classalbert_1_1IndexQueryHandler.html)
-  Convenience class performing implicit (fuzzy) matching.
 - [`IndexItem`](/reference/classalbert_1_1IndexItem.html)
   Used by `IndexQueryHandler` to associate an item with a lookup string.
 - [`Matcher`](/reference/classalbert_1_1Matcher.html)
-  Utility for string matching.
+  Utility for configurable string matching.
 
 ### Others interfaces