Package com.saxonica.xsltextn.pedigree

package com.saxonica.xsltextn.pedigree

This package contains classes associated with the implementation of the saxon:deep-update extension instruction.

This instruction uses a special implementation of maps in which navigation through a tree of maps maintains information about the route by which the leaf maps were reached. This information is referred to as a pedigree. The data structure used is analogous to the concept of a "zipper" found in some functional programming languages. By maintaining the connection between the root of a tree and the leaves, it becomes possible for an update to the leaves of the tree to be propagated upwards, resulting in a new version of the object at the root of the tree.

Related Packages

Package	Description
com.saxonica.xsltextn	This package and its subpackages contain implementations of Saxon-EE and Saxon-PE extensions to the base W3C XSLT specification: extension instructions and extension functions specific to XSLT.
com.saxonica.xsltextn.instruct	This package contains implementations of XSLT extension instructions available in Saxon-PE and Saxon-EE.
com.saxonica.xsltextn.style	This package contains implementations of XSLT extension instructions available in Saxon-PE and Saxon-EE.

Classes

Class	Description
DelegatingArrayItem	A DelegatingArrayItem is an abstract class representing an array that is implemented by delegating all array-related functionality to a base class.
DelegatingMapItem	A DelegatingMapItem is an abstract class representing a map that is implemented by delegating all map-related functionality to another map.
Pedigree	A Pedigree is transient information relating to a map or array indicating the route by which it was reached; it thus compensates for the absence of parent pointers in a JSON-like tree, by allowing the steps used to reach a map or array in such a structure to be retraced.