Add explanations

Author: mnd999

modules/ROOT/pages/errors/gql-errors/22NCC.adoc

@@ -4,7 +4,9 @@
 error: data exception - node element type specified incorrectly. The node element type `{ <<graphTypeElement>> }` identified by the label `{ <<label>> }` is different to the one specified in the query `{ <<graphTypeElement>> }`.
 
 == Explanation
+This error occurs when attempting to drop a node element type from the graph type, but the specified element type does not match the existing one for the given label. 
 
+When dropping an element type, it is not necessary to specify the full element type; you can simply specify the label. If you do specify an element type, it must match exactly with the existing one in the graph type.
 
 == Example scenario
 

modules/ROOT/pages/errors/gql-errors/22NCD.adoc

@@ -4,6 +4,9 @@
 error: data exception - relationship element type specified incorrectly. The relationship element type `{ <<graphTypeElement>> }` identified by the relationship type `{ <<relType>> }` is different to the one specified in the query `{ <<graphTypeElement>> }`.
 
 == Explanation
+This error occurs when attempting to drop a relationship element type from the graph type, but the specified element type does not match the existing one for the given relationship type. 
+
+When dropping an element type, it is not necessary to specify the full element type; you can simply specify the relationship type. If you do specify an element type, it must match exactly with the existing one in the graph type.
 
 == Example scenario
 

modules/ROOT/pages/errors/gql-errors/22NCE.adoc

@@ -4,6 +4,7 @@
 error: data exception - node element type in use. The node element type identified by the label `{ <<label>> }` is referenced in the graph type element `{ <<graphTypeReference>> }` and cannot be dropped.
 
 == Explanation
+This error occurs when attempting to drop a node element type from the graph type, but the node element type is still being referenced by a relationship element type in the graph type. To successfully drop the node element type, you must first drop any relationship element types that reference it, or remove it from the relationship element types.
 
 == Example scenario