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| Text.XML.HXT.XPath.XPathDataTypes | | Portability | portable | | Stability | experimental | | Maintainer | Uwe Schmidt (uwe@fh-wedel.de) |
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| Description |
| The core data types of XPath.
The Type NodeSet is based on the module NavTree which was adapted from
HXML (http://www.flightlab.com/~joe/hxml/)
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| Synopsis |
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| Documentation |
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| Represents expression
| | Constructors | | GenExpr Op [Expr] | generic expression with an operator and one or more operands
| | PathExpr (Maybe Expr) (Maybe LocationPath) | a path expression contains an optional filter-expression
or an optional locationpath. one expression is urgently
necessary, both are possible
| | FilterExpr [Expr] | filter-expression with zero or more predicates
| | VarExpr VarName | variable
| | LiteralExpr Literal | string
| | NumberExpr XPNumber | number
| | FctExpr FctName FctArguments | a function with a name and an optional list of arguments
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| Represents XPath operators
| | Constructors | | Or | | | And | | | Eq | | | NEq | | | Less | | | Greater | | | LessEq | | | GreaterEq | | | Plus | | | Minus | | | Div | | | Mod | | | Mult | | | Unary | | | Union | |
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Represents a floating-point number according the IEEE 754 standard
The standard includes a special Not-a-Number (NaN) value,
positive and negative infinity, positive and negative zero.
| | Constructors | | Float Float | floating-point number
| | NaN | not-a-number
| | NegInf | negative infinity
| | Neg0 | negative zero
| | Pos0 | positive zero
| | PosInf | positive infinity
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Represents location path
A location path consists of a sequence of one or more location steps.
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| A location path is either a relative or an absolute path.
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Represents location step
A location step consists of an axis, a node-test and zero or more predicates.
| | Constructors | | | Instances | |
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| Represents XPath axis
| | Constructors | | Ancestor | | | AncestorOrSelf | | | Attribute | | | Child | | | Descendant | | | DescendantOrSelf | | | Following | | | FollowingSibling | | | Namespace | | | Parent | | | Preceding | | | PrecedingSibling | | | Self | |
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| Represents XPath node-tests
| | Constructors | | NameTest QName | name-test
| | PI String | processing-instruction-test with a literal argument
| | TypeTest XPathNode | all nodetype-tests
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| Represents nodetype-tests
| | Constructors | | XPNode | all 7 nodetypes
(root, element, attribute, namespace, pi, comment, text)
| | XPCommentNode | comment-nodes
| | XPPINode | processing-instruction-nodes
| | XPTextNode | text-nodes: cdata, character data
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| Variable name
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| a string
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| Function name
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| Function arguments
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| Evaluation context
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| Context position
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| Context length
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| Context node
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| Represents XPath results
| | Constructors | | XPVNode NodeSet | node-set
| | XPVBool Bool | boolean value
| | XPVNumber XPNumber | number according the IEEE 754 standard
| | XPVString String | string value
| | XPVError String | error message with text
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| Node of navigable tree representation
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| List of nodes of navigable tree representation
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| Type synonym for a list of navigable tree representation
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| A functions that takes a XPath result and returns a XPath result
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XPath environment
All variables are stored in the environment,
each variable name is bound to a value.
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| module Text.XML.HXT.XPath.NavTree |
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| Produced by Haddock version 2.3.0 |
