Frequency table of names of elements and attributes in XML content

This function is used to get an understanding of the use of element and attribute names in an XML document. It uses a collection of handler functions to gather the information via a SAX-style parser. The distribution of attribute names is done within each "type" of element (i.e. element name)

Usage

xmlElementSummary(url, handlers = xmlElementSummaryHandlers(url))

Arguments

url

the source of the XML content, e.g. a file, a URL, a compressed file, or a character string

handlers

the list of handler functions used to collect the information. These are passed to the function xmlEventParse as the value for the handlers parameter.

Value

A list with two elements

nodeCounts

a named vector of counts where the names are the (XML namespace qualified) element names in the XML content

attributes

a list with as many elements as there are elements in the nodeCounts element of the result. Each element of this sub-list gives the frequency counts for the different attributes seen within the XML elements with that name.

Author

Duncan Temple Lang

See also

xmlEventParse

Examples

  xmlElementSummary(system.file("exampleData", "eurofxref-hist.xml.gz", package = "XML"))
#> $nodeCounts
#>            Cube gesmes:Envelope  gesmes:subject   gesmes:Sender     gesmes:name 
#>           60086               1               1               1               1 
#> 
#> $attributes
#> $attributes$`gesmes:Envelope`
#> xmlns:gesmes        xmlns 
#>            1            1 
#> 
#> $attributes$Cube
#>     time currency     rate 
#>     1991    58094    58094 
#> 
#>