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XML (version 1.6-2)

print.XMLAttributeDef: Methods for displaying XML objects

Description

These different methods attempt to provide a convenient way to display R objects representing XML elements when they are printed in the usual manner on the console, files, etc. via the print function. Each typically outputs its contents in the way that they would appear in an XML document.

Usage

print.XMLNode(x, ..., indent= "", tagSeparator = "")
print.XMLComment(x, ..., indent = "", tagSeparator = "")
print.XMLTextNode(x, ..., indent = "", tagSeparator = "")
print.XMLCDataNode(x, ..., indent="", tagSeparator = "")
print.XMLProcessingInstruction(x, ..., indent="", tagSeparator = "")
print.XMLAttributeDef(x, ...)
print.XMLElementContent(x, ...)
print.XMLElementDef(x, ...)
print.XMLEntity(x, ...)
print.XMLEntityRef(x, ..., indent= "", tagSeparator = "")
print.XMLOrContent(x, ...)
print.XMLSequenceContent(x, ...)
x{the XML object to be displayed}
  ...{additional arguments for controlling the output from
  print. Currently unused.}
  indent{a prefix that is emitted before the node to indent it relative to its
    parent and child nodes. This is appended with a space at each
    succesive level of the tree.
    If no indentation is desired (e.g. when xmlTreeParse
    is called with trim and ignoreBlanks
    being FALSE) and TRUE respectively,
    one can pass the value FALSE for this indent argument.
  }
  tagSeparator{when printing nodes, successive nodes and children
    are by default displayed on new lines for easier reading.
    One can specify a string for this argument to control how the
    elements are separated in the output.  The primary purpose of this
    argument is to allow no space between the elements, i.e. a value of "".
  }
Currently, NULL.
http://www.w3.org, http://www.omegahat.org/RSXML
[object Object]

xmlTreeParse We could make the node classes self describing with information about whether ignoreBlanks was TRUE or FALSE and if trim was TRUE or FALSE. This could then be used to determine the appropriate values for indent and tagSeparator. Adding an S3 class element would allow this to be done without the addition of an excessive number of classes. fileName <- system.file("exampleData", "event.xml", package ="XML")

# Example of how to get faithful copy of the XML. doc = xmlRoot(xmlTreeParse(fileName, trim = FALSE, ignoreBlanks = FALSE)) print(doc, indent = FALSE, tagSeparator = "")

# And now the default mechanism doc = xmlRoot(xmlTreeParse(fileName)) print(doc) IO file

Arguments