anchor.diff:  
   === Left-to-right precedence
   
  +Most precedence level include multiple operators.
  +
  +On some levels these operators are grammatical alternatives, e.g. for https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=Atom[<Atom>s], and, hence, have unambiguous precendence.
  +
  +On other levels, however, the grammar allows repetitions of such operators (chaining).
  +For instance, all the following are valid expressions:
  +
  +* `--+-5`
  +* `5 + 4 + 3`
  +* `5 - 4 - 3`
  +* `5 - 4 + 3`
  +* `5 * 4 * 3`
  +* `5 / 4 / 3`
  +* `5 % 4 % 3`
  +* `5 % 4 * 3`
  +* `5 > 4 >= 3`
  +* `list[4..20][2..5][3]`
  +
  +Such chained expression fall into four categories:
  +
  +==== Chaining of unary operators
  +Unary operators that allow chaining on the same precedence level are
  +
  +* https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=UnaryAddOrSubtractExpression[Arithmetic additive inverse]
  +* https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=NotExpression[Boolean negation]
  +
  +Example expression are
  +
  +* `--+-5`
  +* `NOT NOT NOT false`
  +
  +[IMPORTANT]
  +.Chaining of unary operators
  +====
  +The chaining of unary operators has unambiguous operator tree.
  +====
  +
  +==== Chaining of the same associative operator
  +Associative operators that allow chaining are
  +
  +* https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=MultiplyDivideModuloExpression[Multiplication]
  +* https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=AddOrSubtractExpression[Addition]
  +* https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=AndExpression[Boolean conjunction]
  +* https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=OrExpression[Boolean inclusive disjunction]
  +
  +Example expression are
  +
  +* `5 + 4 + 3`
  +* `5 * 4 * 3`
  +* `TRUE AND FALSE AND TRUE`
  +* `TRUE OR FALSE OR TRUE`
  +
  +[IMPORTANT]
  +.Chaining of the same associative operator
  +====
  +For chains of the same associative operator all possible operator trees are semantically equivalent.
  +====
  +
  +==== Chaining of non-associative or mixed operators
  +Non-associative operators that allow chaining with themselves of other operators on the same precedence level are
  +
  +* https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=StringListNullOperatorExpression[String, list, and null operations] (where type-compatible)
  +* https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=PowerOfExpression[Exponentiation]
  +* https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=MultiplyDivideModuloExpression[Division]
  +* https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=MultiplyDivideModuloExpression[Modulo]
  +* https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=AddOrSubtractExpression[Substraction]
  +* https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=OrExpression[Boolean exclusive disjunction]
  +
  +Example expression are
  +
  +* `list[4..20][2..5][3]`
  +* `'foo' STARTS WITH 'fo' IS NOT NULL`
  +* `5 ^ 4 ^ 3`
  +* `5 / 4 / 3`
  +* `5 % 4 % 3`
  +* `5 % 4 * 3`
  +* `5 - 4 - 3`
  +* `5 + 4 - 3`
  +* `TRUE XOR TRUE XOR FALSE`
  +
  +[IMPORTANT]
  +.Chaining of non-associative or mixed operators
  +====
  +In chains of non-associative or mixed operators, for every two operators, the operator appear earlier (more left) in the character string takes precedence, i.e. the operator tree is left-deep.
  +====
  +
  +==== Chaining gives extra semantics
  +Operators whose chaining gives extra semantics are
  +
  +* https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=ComparisonExpression[Comparison operations]
  +
  +Example expression are
  +
  +* `5 = 5 = 5`
  +* `5 = 4 <> 3`
  +* `5 <> 4 > 3`
  +* `5 > 4 > 3`
  +* `5 > 4 >= 3`
  +* `5 >= 4 < 3`
  +
  +[IMPORTANT]
  +.Chaining gives extra semantics
  +====
  +Chains with extra semantics
  +
  +a. form a flat operator tree of a single operator, or
  +b. their semantics is defined by a syntax transformation to an expression that has an unambiguous operator tree based on the other precedence rules stated in this document.
  +====
  +
  +
  +
   == What others do
   
   
  
positive.code: * Less or Equal
  
  |4
  |https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=NotExpression[Boolean negation] (left-hand and right-hand operand)
  |
  
  * Negation
  
negative.code: |Atoms
  |
  
  * https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=Literal[Literals]
  * https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=Variable[Variables]
  * https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=Parameter[Parameters]
  * https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=CaseExpression[Case expressions]
  * https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=ListComprehension[List comprehensions]
  * https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=PatternComprehension[Pattern comprehensions]
  * https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=Reduce[Reduce operations]
  * quantifiers
  * https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=RelationshipsPattern[Pattern predicates]
  * https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=ParenthesizedExpression[Function invocations]
  * https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=ParenthesizedExpression[Existential subqueries]
  * https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=ParenthesizedExpression[Parenthesized expression]
  
  |11
  |https://raw.githack.com/openCypher/openCypher/master/tools/grammar-production-links/grammarLink.html?p=PropertyOrLabelsExpression[Graph element operations]
  