XML (version 3.98-1.1)

[.XMLNode: Convenience accessors for the children of XMLNode objects.

Description

These provide a simplified syntax for extracting the children of an XML node.

Usage

## S3 method for class 'XMLNode':
[(x, ..., all = FALSE)
## S3 method for class 'XMLNode':
[[(x, ...)
## S3 method for class 'XMLDocumentContent':
[[(x, ...)

Arguments

x

the XML node or the top-level document content in which the children are to be accessed. The XMLDocumentContent is the container for the top-level node that also contains information such as the URI/filename and XML version. This accessor

...

the identifiers for the children to be retrieved, given as integer indices, names, etc. in the usual format for the generic link{[} and link{[[} operators

all

logical value. When ...is a character vector, a value of TRUE for all means to retrieve all of the nodes with those names rather than just the first one. FALSE gives the usual result of subsetting a list

Value

• A list or single element containing the children of the XML node given by obj and identified by ....

References

http://www.w3.org/XML, http://www.omegahat.org/RSXML

See Also

xmlAttrs [<-.XMLNode [[<-.XMLNode

Examples

f = system.file("exampleData", "gnumeric.xml", package = "XML")

 top = xmlRoot(xmlTreeParse(f))

  # Get the first RowInfo element.
 top[["Sheets"]][[1]][["Rows"]][["RowInfo"]]

  # Get a list containing only the first row element
 top[["Sheets"]][[1]][["Rows"]]["RowInfo"]
 top[["Sheets"]][[1]][["Rows"]][1]

  # Get all of the RowInfo elements by position
 top[["Sheets"]][[1]][["Rows"]][1:xmlSize(top[["Sheets"]][[1]][["Rows"]])]

  # But more succinctly and accurately, get all of the RowInfo elements
 top[["Sheets"]][[1]][["Rows"]]["RowInfo", all = TRUE]