This function allows the R user to specify an R function that is called each time the XSLT extension module for R is initialized. This happens each time the extension is referenced within an XSL style sheet that is being applied to an XML document. This provides an opportunity for R to perform some additional computations. Typically, the function registers any R functions that should be made available to the extension as extension functions. However, other computations can be performed.
When the package is loaded, a default function
is set as the
initialization function. That handles registering functions
queued with the
also in this package.
an R function which will be called each time the XSLT
extension module is initialized. This function will be called with
two arguments: a character vector of length 1 (i.e. a string) which
identifies the URI of the extension, and an reference to the
XSLT parser context. This is an opaque data type that can be used
in calls to
This returns the previously registered R function that was used for handling the initialization of the extension module. This allows one to save the value and restore it after applying a stylesheet to a particular document or set of documents.
Duncan Temple Lang <[email protected]>
registration.R in the
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