DOC-440 | Add interface examples for APIs and GUI (Concepts section)

README.md

@@ -1384,6 +1384,11 @@ logJsonResponse(response);
 ```
 ````
 
+If an endpoint requires the `_system` database as the context, the URL should be
+set accordingly, e.g. `var url = "/_db/_system/_api/database";`. This ensures
+that the request is issued correctly as the toolchain may process other examples
+that change the database context simultaneously.
+
 Unlike arangosh examples (`` ```js ``), requests and responses
 need to be output explicitly by calling one of the following functions:
 

site/content/3.11/aql/common-errors.md

@@ -59,7 +59,7 @@ Assembling query strings with simple **string concatenation** looks trivial,
 but is potentially **unsafe**. You should use
 [bind parameters](fundamentals/bind-parameters.md) instead whenever possible,
 use query building functionality if provided by a driver (see
-[arangojs AQL Helpers](http://arangodb.github.io/arangojs/latest/modules/_aql_.aql.html)
+[arangojs AQL Helpers](https://arangodb.github.io/arangojs/latest/functions/aql.aql.html)
 for example) or at least sanitize user input with great care.
 
 ### Parameter injection examples