xmlSearchNs: Find a namespace definition object by searching ancestor...
In cosmicexplorer/xmlr: Tools for parsing and generating XML within R and S-Plus.

Description Usage Arguments Value Author(s) References See Also Examples

This function allows one to search an XML tree from a particular node and find the namespace definition for a given namespace prefix or URL. This namespace definition can then be used to set it on a node to make it the effective namespace for that node.

1	xmlSearchNs(node, ns, asPrefix = TRUE, doc = as(node, "XMLInternalDocument"))

`node`	an `XMLInternaElementNode`
`ns`	a character string (vector of length 1). If `asPrefix` is `TRUE`, this is the namespace alias/prefix. If `asPrefix` is `FALSE`, this is the URL of the namespace definition
`asPrefix`	a logical value. See `ns`.
`doc`	the XML document in which the node(s) are located

An object of class XMLNamespaceRef.

Duncan Temple Lang

libxml2

newXMLNode

 txt = '<top xmlns:r="http://www.r-project.org"><section><bottom/></section></top>'

 doc = xmlParse(txt)
 bottom = xmlRoot(doc)[[1]][[1]]
 xmlSearchNs(bottom, "r")