Use pugiXML to rename nodes based on a std::map

I'm new to C++ but I am trying to define a standard set of node names and then map to them.

For example my standard import / output schema is this:

<data>
<entry>
<id>1</id>
<description>Test</description>
</entry>
</data>

However sometimes my XML import will be named differently so I want to create a map so it still outputs in the above format, even if the input file has this naming convention:

<data>
<entry>
<id>1</id>
<content>Test</content>
</entry>
</data>

This code is my best guess based on the documentation and help I've got, but I have got stuck in trying to complete it:

#include "pugi/pugixml.hpp"

#include <iostream>
#include <string>
#include <map>

int main()
{

    // Define mappings, default left - map on the right
    const std::map<std::string, std::string> tagmaps
    {
          {"id", "id"}
        , {"description", "content"}
    };

    pugi::xml_document doca, docb;
    std::map<std::string, pugi::xml_node> mapa, mapb;

    for (auto& node: doca.child("data").children("entry")) {
        const char* id = node.child_value("id");
        mapa[id] = node;
    }

    for (auto& node: docb.child("data").children("entry")) {
        const char* idcs = node.child_value("id");
        if (!mapa.erase(idcs)) {
            mapb[idcs] = node;
        }
    }

    for (auto& eb: mapb) {
        // change node name if mapping found
        if((found = tagmaps.find(n.name())) != tagmaps.end()) {
            n.set_name(found->second.c_str());
        }

    }

}

This code would ideally allow the xml to be formatted either way but always output the same. Any help would be really appreciated.