XiMpLe_node,-class {XiMpLe}

Classes XiMpLe_node and XiMpLe.node (old)

Description

These classes are used to create DOM trees of XML documents, like objects that are returned by parseXMLTree.

Usage

is.XiMpLe.node(x)

is.XiMpLe_node(x)

as_XiMpLe_node(obj, extra = list(), version = 2)

## S4 method for signature 'XiMpLe.node'
as_XiMpLe_node(obj, extra = list(), version = 2)

Arguments

x

An arbitrary R object.

obj

An object of old class XiMpLe.node.

extra

A list of values to set the extra slot. Note that this will be applied recursively on child nodes also.

version

Integer numeric, to set the version slot. Note that this will be applied recursively on child nodes also.

Details

Class XiMpLe.node is the older one, XiMpLe_node was introduced with XiMpLe 0.11-1. It has two new slots (extra and version) that would have made it impossible to load old objects without issues. XiMpLe_node inherits from XiMpLe.node. You can convert old objects into valid new ones using the as_XiMpLe_node method and are also advised to do so, as the XiMpLe.node class might become deprecated in future releases.

There are certain special values predefined for the name slot to easily create special XML elements:

name=""

If the name is an empty character string, a pseudo node is created, pasteXMLNode will paste its value as plain text.

name="!--"

Creates a comment tag, i.e., this will comment out all its children.

name="![CDATA["

Creates a CDATA section and places all its children in it.

name="*![CDATA["

Creates a CDATA section and places all its children in it, where the CDATA markers are commented out by /* */, as is used for JavaScript in XHTML.

A contructor function XiMpLe_node(...) is available to be used instead of new("XiMpLe_node", ...).

There's also XiMpLe_node_old(...) to be used instead of new("XiMpLe.node", ...), but you should not use that any longer.

Slots

name

Name of the node (i.e., the XML tag identifier). For special names see details.

attributes

A list of named character values, representing the attributes of this node. Use character() as value for empty attributes.

children

A list of further objects of class XiMpLe.node, representing child nodes of this node.

value

Plain text to be used as the enclosed value of this node. Set to value="" if you want a childless node to be forced into an non-empty pair of start and end tags by pasteXMLNode.

extra

A named list that can be used to store additional information on a node (XiMpLe_node only). The only value with a noticeable effect as of now (version 2) is:

shine:

A numeric integer value between 0 and 2, overwriting the shine value of, e.g., pasteXML for this particular node.

version

A numeric integer, currently defaults to 2 (XiMpLe_node only). This is a version number that can be used in the future in combination with the added extra slot. Should that get more supported values like shine that are interpreted by package methods, the version number will be increased and the differences documented here. You shouldn't set it manually.