anchor.diff:  
   	   CAST ( <expr> AS <type> )
   
  -There are some variations in how different implementations support casting. This is detailed below.
  +There are some variations in how different implementations support casting.
  +This is detailed below.
   
   ==== PostgreSQL
   Casting in PostgreSQL can be achieved by using cast functions in addition to the AS keyword:
  
positive.code: 
  [source, ebnf]
  ----
  type = scalar type
       | container type
       | nullable type
       ;
  
  nullable type = type, "?";
  
  scalar type   = "ANY"
                | "BOOLEAN"
                | "INTEGER"
                | "FLOAT"
                | "IDENTITY"
                | "MAP"
                | "NODE"
                | "STRING"
                | "RELATIONSHIP"
                | "PATH"
                | "NUMBER"
                | "DATETIME"
                | "LOCALDATETIME"
                | "DATE"
                | "TIME"
  
negative.code: [abstract]
  .Abstract
  
  This CIP specifies the Public Type System (PTS) of Cypher and introduces literal syntax for writing down types as well as new syntax for type annotations. The proposed type annotation syntax does not change the Cypher grammar right now but rather is intended as a template to be used by future CIPs. This CIP also informatively discusses future syntax that might use the introduced literal type syntax.
  
  toc::[]
  
  