upd

Author: MatheusDS4

src/sx-definitions/namespace-definition.md

@@ -1,10 +1,22 @@
 # Namespace definition
 
-The namespace definition may be used to define a namespace that may be used for protecting or versioning other definitions and XML data processing.
+The namespace definition may be primarily used to define a namespace that may be used for protecting or versioning other definitions and XML data processing.
 
 ```
 namespace ns1
-namespace ns2 = "http://example.com/secret"
+namespace ns2 = "http://example.com/secret/2015"
+```
+
+In addition, the namespace definition may also be used to define aliases to a package wildcard import, as in:
+
+```
+// com.inexistentninja.kunai.*
+namespace kunai = "com.inexistentninja.kunai";
+
+// an alias to the top-level package.
+// users can just use `global` if it doesn't conflict
+// with their names.
+namespace shock_global = global;
 ```
 
 **Syntax**
@@ -15,4 +27,8 @@ namespace ns2 = "http://example.com/secret"
         <b>namespace</b> <i>IdentifierName</i><br>
         <b>namespace</b> <i>IdentifierName</i> <b>=</b> <i>AssignmentExpression</i><sup>allowIn</sup>
     </ul>
-</ul>
+</ul>
+
+**Semantics**
+
+A URI namespace contains at least a colon; namespaces assigned a string literal without a colon will result into an alias to a package wildcard import.