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## net.sf.saxon.expr
Class Token

    java.lang.Object
      net.sf.saxon.expr.Token

public abstract class Token
extends java.lang.Object

This class holds static constants and methods defining the lexical tokens used in XPath and XQuery, and associated keywords.

Field Summary
`static int` | `AND` Operator "and"
`static int` | `ASSIGN` ":=" symbol (XQuery only)
`static int` | `AT` At token, "@"
`static int` | `ATTRIBUTE_QNAME` composite token <'attribute' QNAME> (XQuery only)
`static int` | `AXIS` Token representing the name of an axis and the following "::" symbol
`static int` | `CASE` Keyword "case"
`static int` | `CAST_AS` operator "cast as"
`static int` | `CASTABLE_AS` operator "castable as"
`static int` | `COLONCOLON` "::" symbol
`static int` | `COLONSTAR` ":*" symbol
`static int` | `COMMA` Comma token
`static int` | `DECLARE_BASEURI` "declare base-uri"
`static int` | `DECLARE_BOUNDARY_SPACE` "declare boundary-space"
`static int` | `DECLARE_CONSTRUCTION` "declare construction"
`static int` | `DECLARE_COPY_NAMESPACES` "declare copy-namespaces"
`static int` | `DECLARE_DEFAULT` "declare default"
`static int` | `DECLARE_FUNCTION` "define function"
`static int` | `DECLARE_NAMESPACE` "declare namespace"
`static int` | `DECLARE_OPTION` "declare option"
`static int` | `DECLARE_ORDERING` "declare xmlspace"
`static int` | `DECLARE_VARIABLE` "define variable"
`static int` | `DEFAULT` Keyword "default"
`static int` | `DIV` Operator "div"
`static int` | `DOLLAR` "$" symbol
`static int` | `DOT` "." symbol
`static int` | `DOTDOT` ".." symbol
`static java.util.HashMap` | `doubleKeywords` Lookup table for composite (two-keyword) tokens
`static int` | `ELEMENT_QNAME` composite token <'element' QNAME> (XQuery only)
`static int` | `ELSE` Keyword "else"
`static int` | `EOF` Pseudo-token representing the end of the expression
`static int` | `EQUALS` Equals token ("=")
`static int` | `EVERY` Keyword "every"
`static int` | `EXCEPT` Operator "except"
`static int` | `FEQ` operator "eq"
`static int` | `FGE` operator "ge"
`static int` | `FGT` operator "gt"
`static int` | `FLE` opeartor "le"
`static int` | `FLT` operator "lt"
`static int` | `FNE` operator "ne"
`static int` | `FOLLOWS` Operator ">>"
`static int` | `FOR` "for" keyword
`static int` | `FUNCTION` Token representing the name of a function and the following "(" symbol
`static int` | `GE` Operator ">="
`static int` | `GT` Operator ">"
`static int` | `IDIV` operator "idiv"
`static int` | `IF` Keyword "if"
`static int` | `IMPORT_MODULE` "import module"
`static int` | `IMPORT_SCHEMA` "import schema"
`static int` | `IN` Keyword "in"
`static int` | `INSTANCE_OF` operator "instance of"
`static int` | `INTERSECT` Operator "intersect"
`static int` | `IS` Operator "is"
`static int` | `KEYWORD_CURLY` composite token: (XQuery only)
`static int` | `LCURLY` "{" symbol (XQuery only)
`static int` | `LE` Operator "<="
`static int` | `LET` "let" keyword (XQuery only)
`static int` | `LPAR` Left parenthesis
`static int` | `LSQB` Left square bracket
`static int` | `LT` Operator "<"
`static int` | `MINUS` Binary minus operator
`static int` | `MOD` Operator "mod"
`static int` | `MODULE_NAMESPACE` "module namespace"
`static int` | `MULT` Multiply operator, "*" when used in an operator context
`static int` | `NAME` Name token (a QName, in general)
`static int` | `NE` Operator not-equals.
`static int` | `NEGATE` Unary minus sign
`static int` | `NODEKIND` Node kind, e.g.
`static int` | `NUMBER` Numeric literal
`static int` | `OR` Operator "or"
`static int` | `PI_QNAME` composite token <'pi' QNAME> (XQuery only)
`static int` | `PLUS` Operator "+"
`static int` | `PRAGMA` A token representing an XQuery pragma.
`static int` | `PRECEDES` Operator "<<"
`static int` | `PREFIX` "prefix:*" token
`static int` | `QMARK` Question mark symbol.
`static int` | `RCURLY` "}" symbol (XQuery only)
`static int` | `RETURN` Keyword "return"
`static int` | `RPAR` Right parenthesis
`static int` | `RSQB` Right square bracket
`static int` | `SATISFIES` Keyword "satisfies"
`static int` | `SEMICOLON` semicolon separator
`static int` | `SLASH` Forwards "/"
`static int` | `SLSL` Double forwards slash, "//"
`static int` | `SOME` Keyword "some"
`static int` | `STAR` "*" symbol when used as a wildcard
`static int` | `STRING_LITERAL` String literal
`static int` | `SUFFIX` "*:" token
`static int` | `TAG` "<" at the start of a tag (XQuery only).
`static int` | `THEN` Ketword "then"
`static int` | `TO` Operator "to"
`static java.lang.String[]` | `tokens` The following strings are used to represent tokens in error messages
`static int` | `TREAT_AS` operator "treat as"
`static int` | `TYPESWITCH` Keyword "typeswitch"
`static int` | `UNION` "union" or "|" token
`static int` | `UNKNOWN` Pseudo-token representing the start of the expression
`static int` | `VALIDATE` Various compound symbols supporting XQuery validation expression
`static int` | `VALIDATE_LAX`
`static int` | `VALIDATE_STRICT`
`static int` | `WHERE` Keyword "where"
`static int` | `XQUERY_VERSION` "xquery version"

Method Summary
`static int` | `inverse(int operator)` Return the inverse of a relational operator, so that "a op b" can be rewritten as "b inverse(op) a"
`static boolean` | `isOrderedOperator(int operator)`
`static int` | `negate(int operator)` Return the negation of a relational operator, so that "a op b" can be rewritten as not(b op' a)

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### EOF

    public static final int EOF

  Pseudo-token representing the end of the expression

  See Also:
    Constant Field Values

### UNION

    public static final int UNION

  "union" or "|" token

  See Also:
    Constant Field Values

### SLASH

    public static final int SLASH

  Forwards "/"

  See Also:
    Constant Field Values

### AT

    public static final int AT

  At token, "@"

  See Also:
    Constant Field Values

### LSQB

    public static final int LSQB

  Left square bracket

  See Also:
    Constant Field Values

### LPAR

    public static final int LPAR

  Left parenthesis

  See Also:
    Constant Field Values

### EQUALS

    public static final int EQUALS

  Equals token ("=")

  See Also:
    Constant Field Values

### COMMA

    public static final int COMMA

  Comma token

  See Also:
    Constant Field Values

### SLSL

    public static final int SLSL

  Double forwards slash, "//"

  See Also:
    Constant Field Values

### OR

    public static final int OR

  Operator "or"

  See Also:
    Constant Field Values

### AND

    public static final int AND

  Operator "and"

  See Also:
    Constant Field Values

### GT

    public static final int GT

  Operator ">"

  See Also:
    Constant Field Values

### LT

    public static final int LT

  Operator "<"

  See Also:
    Constant Field Values

### GE

    public static final int GE

  Operator ">="

  See Also:
    Constant Field Values

### LE

    public static final int LE

  Operator "<="

  See Also:
    Constant Field Values

### PLUS

    public static final int PLUS

  Operator "+"

  See Also:
    Constant Field Values

### MINUS

    public static final int MINUS

  Binary minus operator

  See Also:
    Constant Field Values

### MULT

    public static final int MULT

  Multiply operator, "*" when used in an operator context

  See Also:
    Constant Field Values

### DIV

    public static final int DIV

  Operator "div"

  See Also:
    Constant Field Values

### MOD

    public static final int MOD

  Operator "mod"

  See Also:
    Constant Field Values

### IS

    public static final int IS

  Operator "is"

  See Also:
    Constant Field Values

### DOLLAR

    public static final int DOLLAR

  "$" symbol

  See Also:
    Constant Field Values

### NE

    public static final int NE

  Operator not-equals. That is, "!="

  See Also:
    Constant Field Values

### INTERSECT

    public static final int INTERSECT

  Operator "intersect"

  See Also:
    Constant Field Values

### EXCEPT

    public static final int EXCEPT

  Operator "except"

  See Also:
    Constant Field Values

### RETURN

    public static final int RETURN

  Keyword "return"

  See Also:
    Constant Field Values

### THEN

    public static final int THEN

  Ketword "then"

  See Also:
    Constant Field Values

### ELSE

    public static final int ELSE

  Keyword "else"

  See Also:
    Constant Field Values

### WHERE

    public static final int WHERE

  Keyword "where"

  See Also:
    Constant Field Values

### TO

    public static final int TO

  Operator "to"

  See Also:
    Constant Field Values

### IN

    public static final int IN

  Keyword "in"

  See Also:
    Constant Field Values

### SOME

    public static final int SOME

  Keyword "some"

  See Also:
    Constant Field Values

### EVERY

    public static final int EVERY

  Keyword "every"

  See Also:
    Constant Field Values

### SATISFIES

    public static final int SATISFIES

  Keyword "satisfies"

  See Also:
    Constant Field Values

### FUNCTION

    public static final int FUNCTION

  Token representing the name of a function and the following "(" symbol

  See Also:
    Constant Field Values

### AXIS

    public static final int AXIS

  Token representing the name of an axis and the following "::" symbol

  See Also:
    Constant Field Values

### IF

    public static final int IF

  Keyword "if"

  See Also:
    Constant Field Values

### PRECEDES

    public static final int PRECEDES

  Operator "<<"

  See Also:
    Constant Field Values

### FOLLOWS

    public static final int FOLLOWS

  Operator ">>"

  See Also:
    Constant Field Values

### COLONCOLON

    public static final int COLONCOLON

  "::" symbol

  See Also:
    Constant Field Values

### COLONSTAR

    public static final int COLONSTAR

  ":*" symbol

  See Also:
    Constant Field Values

### INSTANCE_OF

    public static final int INSTANCE_OF

  operator "instance of"

  See Also:
    Constant Field Values

### CAST_AS

    public static final int CAST_AS

  operator "cast as"

  See Also:
    Constant Field Values

### TREAT_AS

    public static final int TREAT_AS

  operator "treat as"

  See Also:
    Constant Field Values

### FEQ

    public static final int FEQ

  operator "eq"

  See Also:
    Constant Field Values

### FNE

    public static final int FNE

  operator "ne"

  See Also:
    Constant Field Values

### FGT

    public static final int FGT

  operator "gt"

  See Also:
    Constant Field Values

### FLT

    public static final int FLT

  operator "lt"

  See Also:
    Constant Field Values

### FGE

    public static final int FGE

  operator "ge"

  See Also:
    Constant Field Values

### FLE

    public static final int FLE

  opeartor "le"

  See Also:
    Constant Field Values

### IDIV

    public static final int IDIV

  operator "idiv"

  See Also:
    Constant Field Values

### CASTABLE_AS

    public static final int CASTABLE_AS

  operator "castable as"

  See Also:
    Constant Field Values

### ASSIGN

    public static final int ASSIGN

  ":=" symbol (XQuery only)

  See Also:
    Constant Field Values

### LCURLY

    public static final int LCURLY

  "{" symbol (XQuery only)

  See Also:
    Constant Field Values

### KEYWORD_CURLY

    public static final int KEYWORD_CURLY

  composite token: (XQuery only)

  See Also:
    Constant Field Values

### ELEMENT_QNAME

    public static final int ELEMENT_QNAME

  composite token <'element' QNAME> (XQuery only)

  See Also:
    Constant Field Values

### ATTRIBUTE_QNAME

    public static final int ATTRIBUTE_QNAME

  composite token <'attribute' QNAME> (XQuery only)

  See Also:
    Constant Field Values

### PI_QNAME

    public static final int PI_QNAME

  composite token <'pi' QNAME> (XQuery only)

  See Also:
    Constant Field Values

### TYPESWITCH

    public static final int TYPESWITCH

  Keyword "typeswitch"

  See Also:
    Constant Field Values

### CASE

    public static final int CASE

  Keyword "case"

  See Also:
    Constant Field Values

### DEFAULT

    public static final int DEFAULT

  Keyword "default"

  See Also:
    Constant Field Values

### NODEKIND

    public static final int NODEKIND

  Node kind, e.g. "node()" or "comment()"

  See Also:
    Constant Field Values

### SUFFIX

    public static final int SUFFIX

  "*:" token

  See Also:
    Constant Field Values

### XQUERY_VERSION

    public static final int XQUERY_VERSION

  "xquery version"

  See Also:
    Constant Field Values

### DECLARE_NAMESPACE

    public static final int DECLARE_NAMESPACE

  "declare namespace"

  See Also:
    Constant Field Values

### DECLARE_DEFAULT

    public static final int DECLARE_DEFAULT

  "declare default"

  See Also:
    Constant Field Values

### DECLARE_CONSTRUCTION

    public static final int DECLARE_CONSTRUCTION

  "declare construction"

  See Also:
    Constant Field Values

### DECLARE_BASEURI

    public static final int DECLARE_BASEURI

  "declare base-uri"

  See Also:
    Constant Field Values

### DECLARE_BOUNDARY_SPACE

    public static final int DECLARE_BOUNDARY_SPACE

  "declare boundary-space"

  See Also:
    Constant Field Values

### IMPORT_SCHEMA

    public static final int IMPORT_SCHEMA

  "import schema"

  See Also:
    Constant Field Values

### IMPORT_MODULE

    public static final int IMPORT_MODULE

  "import module"

  See Also:
    Constant Field Values

### DECLARE_VARIABLE

    public static final int DECLARE_VARIABLE

  "define variable"

  See Also:
    Constant Field Values

### DECLARE_FUNCTION

    public static final int DECLARE_FUNCTION

  "define function"

  See Also:
    Constant Field Values

### MODULE_NAMESPACE

    public static final int MODULE_NAMESPACE

  "module namespace"

  See Also:
    Constant Field Values

### VALIDATE

    public static final int VALIDATE

  Various compound symbols supporting XQuery validation expression

  See Also:
    Constant Field Values

### VALIDATE_STRICT

    public static final int VALIDATE_STRICT

See Also:
  Constant Field Values

### VALIDATE_LAX

    public static final int VALIDATE_LAX

See Also:
  Constant Field Values

### DECLARE_ORDERING

    public static final int DECLARE_ORDERING

  "declare xmlspace"

  See Also:
    Constant Field Values

### DECLARE_COPY_NAMESPACES

    public static final int DECLARE_COPY_NAMESPACES

  "declare copy-namespaces"

  See Also:
    Constant Field Values

### DECLARE_OPTION

    public static final int DECLARE_OPTION

  "declare option"

  See Also:
    Constant Field Values

### SEMICOLON

    public static final int SEMICOLON

  semicolon separator

  See Also:
    Constant Field Values

### NAME

    public static final int NAME

  Name token (a QName, in general)

  See Also:
    Constant Field Values

### STRING_LITERAL

    public static final int STRING_LITERAL

  String literal

  See Also:
    Constant Field Values

### RSQB

    public static final int RSQB

  Right square bracket

  See Also:
    Constant Field Values

### RPAR

    public static final int RPAR

  Right parenthesis

  See Also:
    Constant Field Values

### DOT

    public static final int DOT

  "." symbol

  See Also:
    Constant Field Values

### DOTDOT

    public static final int DOTDOT

  ".." symbol

  See Also:
    Constant Field Values

### STAR

    public static final int STAR

  "*" symbol when used as a wildcard

  See Also:
    Constant Field Values

### PREFIX

    public static final int PREFIX

  "prefix:*" token

  See Also:
    Constant Field Values

### NUMBER

    public static final int NUMBER

  Numeric literal

  See Also:
    Constant Field Values

### FOR

    public static final int FOR

  "for" keyword

  See Also:
    Constant Field Values

### QMARK

    public static final int QMARK

  Question mark symbol. That is, "?"

  See Also:
    Constant Field Values

### RCURLY

    public static final int RCURLY

  "}" symbol (XQuery only)

  See Also:
    Constant Field Values

### LET

    public static final int LET

  "let" keyword (XQuery only)

  See Also:
    Constant Field Values

### TAG

    public static final int TAG

  "<" at the start of a tag (XQuery only). The pseudo-XML syntax that follows is read character-by-character by the XQuery parser

  See Also:
    Constant Field Values

### PRAGMA

    public static final int PRAGMA

  A token representing an XQuery pragma. This construct "(# .... #)" is regarded as a single token, for the QueryParser to sort out.

  See Also:
    Constant Field Values

### NEGATE

    public static final int NEGATE

  Unary minus sign

  See Also:
    Constant Field Values

### tokens

    public static java.lang.String[] tokens

  The following strings are used to represent tokens in error messages

### doubleKeywords

    public static java.util.HashMap doubleKeywords

  Lookup table for composite (two-keyword) tokens

### UNKNOWN

    public static final int UNKNOWN

  Pseudo-token representing the start of the expression

  See Also:
    Constant Field Values

Method Detail

### inverse

    public static final int inverse(int operator)

  Return the inverse of a relational operator, so that "a op b" can be rewritten as "b inverse(op) a"

### negate

    public static final int negate(int operator)

  Return the negation of a relational operator, so that "a op b" can be rewritten as not(b op' a)

### isOrderedOperator

    public static boolean isOrderedOperator(int operator)

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