Modulehxt-9.3.1.22Haskell2010

Data.Tree.NavigatableTree.XPathAxis

Navigatable trees need to have operations to move up, down, left and right. With these elementary operations, the XPath axises can be defined.

valuemaybeStar :: (a -> Maybe a) -> a -> [a]

collect all trees by moving into one direction, starting tree is included

valuemaybePlus :: (a -> Maybe a) -> a -> [a]

collect all trees by moving into one direction, starting tree is not included

valueparentAxis :: NavigatableTree t => t a -> [t a]

XPath axis: parent

valueancestorAxis :: NavigatableTree t => t a -> [t a]

XPath axis: ancestor

valueancestorOrSelfAxis :: NavigatableTree t => t a -> [t a]

XPath axis: ancestor or self

valuechildAxis :: NavigatableTree t => t a -> [t a]

XPath axis: child

valuedescendantAxis :: NavigatableTree t => t a -> [t a]

XPath axis: descendant

valuedescendantOrSelfAxis :: NavigatableTree t => t a -> [t a]

XPath axis: descendant or self

valuerevDescendantOrSelfAxis :: NavigatableTree t => t a -> [t a]

not an official XPath axis but useful: reverse descendant or self, used in preceding axis

valuefollowingSiblingAxis :: NavigatableTree t => t a -> [t a]

XPath axis: following sibling

valueprecedingSiblingAxis :: NavigatableTree t => t a -> [t a]

XPath axis: preceeding sibling

valueselfAxis :: NavigatableTree t => t a -> [t a]

XPath axis: self

valuefollowingAxis :: NavigatableTree t => t a -> [t a]

XPath axis: following

valueprecedingAxis :: NavigatableTree t => t a -> [t a]

XPath axis: preceding

valuemvToRoot :: NavigatableTree t => t a -> t a

move to the root

valueisAtRoot :: NavigatableTree t => t a -> Bool