XML (version 0.7-0)

supportsExpat: Determines which native XML parsers are being used.

Description

Use of the Gnome libxml and Expat parsers is supported in this R/S XML package, but both need not be used when compiling the package. These functions determine whether each is available in the underlying native code.

Usage

supportsExpat()
supportsLibxml()

Value

• Returns TRUE if the corresponding library has been linked into the package.

Details

One might to use different parsers to test validity of a document in different ways and to get different error messages. Additionally, one parser may be more efficient than the other. These methods allow one to write code in such a way that one parser is preferred and is used if it is available, but the other is used if the first is not available.

References

http://www.w3.org/XML, http://www.jclark.com/xml, http://www.omegahat.org

See Also

xmlEventParse

Examples

# use Expat if possible, otherwise libxml
  fileName <- system.file("exampleData", "mtcars.xml", package="XML")
  xmlEventParse(fileName, useExpat = supportsLibxml())