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.
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.
TRUE if the corresponding library
has been linked into the package.
Duncan Temple Lang
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