Add dynamically referenced labels and types to allowed parameters (#1144)

Author: JPryce-Aklundh

modules/ROOT/pages/clauses/where.adoc

@@ -185,12 +185,19 @@ The `name`, `age` and `email` values for `Peter` are returned because `Andy` has
 
 To filter on a property using a dynamically computed name, use square bracket syntax:
 
+.Parameters
+[source, parameters]
+----
+{
+  "propname": "age"
+}
+----
+
 .Query
 [source, cypher]
 ----
-WITH 'AGE' AS propname
 MATCH (n:Person)
-WHERE n[toLower(propname)] < 30
+WHERE n[$propname] < 30
 RETURN n.name, n.age
 ----
 

modules/ROOT/pages/syntax/parameters.adoc

@@ -15,14 +15,16 @@ Additionally, parameters make caching of execution plans much easier for Cypher,
 
 Parameters can be used for:
 
-* literals and expressions
-* node and relationship ids
+* Literals and expressions.
+* Node and relationship ids.
+* Properties, when referenced dynamically (for more information, see xref:clauses/where.adoc#filter-on-dynamic-property[Filter on dynamically-computed node property]).
+* Node labels and relationship types, when referenced dynamically (for more information, see xref:clauses/match.adoc#dynamic-match[`MATCH` using dynamic node labels and relationship types]).
 
 Parameters cannot be used for the following constructs, as these form part of the query structure that is compiled into a query plan:
 
-* property keys; so `MATCH (n) WHERE n.$param = 'something'` is invalid
-* relationship types; so `MATCH (n)-[:$param]->(m)` is invalid
-* labels; so `MATCH (n:$param)` is invalid
+* Property keys; `MATCH (n) WHERE n.$param = 'something'` is invalid.
+* Relationship types; `MATCH (n)-[:$param]->(m)` is invalid.
+* Node labels; `MATCH (n:$param)` is invalid.
 
 Parameters may consist of letters and numbers, and any combination of these, but cannot start with a number or a currency symbol.