Determines whether an XML element allows a particular type of sub-element.

DESCRIPTION:

This tests whether name is a legitimate tag to use as a direct sub-element of the element tag according to the definition of the element element in the specified DTD. This is a generic function that dispatches on the element type, so that different version take effect for XMLSequenceContent, XMLOrContent , XMLElementContent.

USAGE:

dtdElementValidEntry(element, name, pos=NULL)

ARGUMENTS:

element
The XMLElementDef defining the tag in which we are asking whether the sub-element can be used.
name
The name of the sub-element about which we are querying the list of sub-tags within element.
pos
An optional argument which, if supplied, queries whether the name sub-element is valid as the pos-th child of element.

DETAILS:

This is not intended to be called directly, but indirectly by the function.

VALUE:

Logical value indicating whether the sub-element can appear in an element tag or not.

AUTHOR(S):

Duncan Temple Lang

REFERENCES:

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

SEE ALSO:

, ,

EXAMPLES:

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

  dtdElementValidEntry(dtdElement("variables",dtd), "variable")