XML (version 3.1-1)

dtdValidElement: Determines whether an XML tag is valid within another.

Description

This tests whether name is a legitimate tag to use as a direct sub-element of the within tag according to the definition of the within element in the specified DTD.

Usage

dtdValidElement(name, within, dtd, pos=NULL)

Value

• Returns a logical value. TRUE indicates that a name element can be used inside a within element. FALSE indicates that it cannot.

Details

This applies to direct sub-elements or children of the within tag and not tags nested within children of that tag, i.e. descendants.

References

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

See Also

parseDTD, dtdElement, dtdElementValidEntry,

Examples

dtdFile <- system.file("exampleData", "foo.dtd", package="XML")
 foo.dtd <- parseDTD(dtdFile)

  # The following are true.
 dtdValidElement("variable","variables", dtd = foo.dtd)
 dtdValidElement("record","dataset", dtd = foo.dtd)

  # This is false.
 dtdValidElement("variable","dataset", dtd = foo.dtd)