R: Find a namespace definition object by searching ancestor...

xmlSearchNs {XML} | R Documentation

## Find a namespace definition object by searching ancestor nodes

### Description

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.

### Usage

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

### Arguments

`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

### Value

An object of class XMLNamespaceRef.

### Author(s)

Duncan Temple Lang

### References

libxml2

### See Also

`newXMLNode`

### Examples

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

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

[Package XML version 3.98-1.19 Index]