Polishing

framework-docs/modules/ROOT/pages/core/expressions.adoc

@@ -33,8 +33,10 @@ populate them are listed at the end of the chapter.
 The expression language supports the following functionality:
 
 * Literal expressions
-* Boolean and relational operators
+* Boolean, relational, and logical operators
 * Regular expressions
+* String operators
+* Mathematical operators
 * Class expressions
 * Accessing properties, arrays, lists, and maps
 * Method invocation
@@ -44,15 +46,10 @@ The expression language supports the following functionality:
 * Array construction
 * Inline lists
 * Inline maps
-* Ternary operator
+* Ternary and Elvis operators
 * Variables
-* User-defined functions added to the context
-  * reflective invocation of `Method`
-  * various cases of `MethodHandle`
+* User-defined functions
 * Collection projection
 * Collection selection
 * Templated expressions
 
-
-
-

framework-docs/modules/ROOT/pages/core/expressions/language-ref/operators.adoc

@@ -167,6 +167,7 @@ Java::
 	boolean falseValue = parser.parseExpression("!true").getValue(Boolean.class);
 
 	// -- AND and NOT --
+
 	String expression = "isMember('Nikola Tesla') and !isMember('Mihajlo Pupin')";
 	boolean falseValue = parser.parseExpression(expression).getValue(societyContext, Boolean.class);
 ----
@@ -199,6 +200,7 @@ Kotlin::
 	val falseValue = parser.parseExpression("!true").getValue(Boolean::class.java)
 
 	// -- AND and NOT --
+
 	val expression = "isMember('Nikola Tesla') and !isMember('Mihajlo Pupin')"
 	val falseValue = parser.parseExpression(expression).getValue(societyContext, Boolean::class.java)
 ----

framework-docs/modules/ROOT/pages/core/expressions/language-ref/variables.adoc

@@ -13,6 +13,8 @@ Variable names must be composed of one or more of the following supported types
 characters.
 
 * letter: any character for which `java.lang.Character.isLetter(char)` returns `true`
+  - This includes letters such as `A` to `Z`, `a` to `z`, `ü`, `ñ`, and `é` as well as
+    letters from other character sets such as Chinese, Japanese, Cyrillic, etc.
 * digit: `0` to `9`
 * underscore: `_`
 * dollar sign: `$`