In R, how do I combine two XML documents into one document?

Question

I\'m querying data from an XML-based API. The API responses are paginated, so I have to make a bunch of queries to get the full data set.

Using read_xml fro

Answer 1

Consider the XML package to initialize an empty document with and iteratively append other XML content using addChildren() method from the root of each XML.

library(XML)

doc = newXMLDoc()
root = newXMLNode("root", doc = doc)

# LOOP THROUGH 50 REQUESTS
lapply(seq(50), function(i) {
    # PARSE ALL CONTENT
    tmp <- xmlParse("/path/to/API/call")

    # APPEND FROM API XML ROOT
    addChildren(root, getNodeSet(tmp, '/apixmlroot'))
})

# SAVE TO FILE OR USE doc FOR FURTHER WORK 
saveXML(doc, file="/path/to/output.xml")

I cannot find a counterpart method in xml2 as its xml_add_child requires a character string not node(s).