dynamicData: Restore data from within the document

In duncantl/XDynDocs: Dynamic Documents with XML and XSL

Restore data from within the document

Description

This function reads and restores data that is contained within the R-Docbook document. It processes nodes such as <r:value>, <r:object> and <r:data>. It reads the content of such nodes and uses the type attribute to determine how to interpret this. It then restores the contents to an R object. It uses the id attribute to assign the resulting object to a variable. This mechanism allows us to serialize objects within the R-Docbook document.

This is exported primarily so it is visible and callable by XSL code. This could be achieved by explicitly registering at as an XSL function.

Usage

dynamicData(ctxt, node, format = "", env = globalenv())

Arguments

ctxt	the context of the XSL processing which allows us to access different aspects of the XSL engine currently in effect. This allows the function to access, for example, the XSL parameters.
node	the XML node containing the data
format	the format of the data within the node. This can be specified by the caller but is typically extracted from the attributes of the node directly.
env	the R environment in which the newly restored object is assigned.

Value

This function is used for its side effect of assigning the object to the R variable.

Author(s)

Duncan Temple Lang

See Also

dynDoc

Examples

  library(XML)
  node = newXMLNode("r:data",
                     "c(0.982123259853467, 0.868113244918645, -0.371478605407784, -0.218572609383354, 
0.152739884559977, -0.406609615475891, 1.12276207375342, -1.32103542882306, 
1.62231853216012, -1.17204274196827)",
                     attrs = c(id = "xxx"),
                      namespaceDefinitions = c("r" = "http://www.r-project.org"))

  dynamicData(NULL, node)

duncantl/XDynDocs documentation built on Jan. 4, 2024, 5:20 p.m.