[erlang-questions] Removing Element from XML

[Wes James]

On Thu, May 12, 2011 at 7:38 AM, Maruthavanan Subbarayan
<maruthavanan_s@REDACTED> wrote:
> Hi,
> I have a xml document like below
> <emp>
> <id>1</id>
> <name>Erlang</name>
> <address>
> <street>Street 1</street>
> <country>Country 1<country>
> </address>
> </emp>
> I have done xmerl_scan:stream, now I need to remove the id , name node such
> that I have only address.
> How do I remove so that I can below.
> <emp>
> <address>
> <street>Street 1</street>
> <country>Country 1<country>
> </address>
> </emp>
> Thanks,
> Marutha

Something like this?? where f.xml is a copy of your sample from your
email pasted in to a file:

-module(px).
-include("/usr/local/lib/erlang/lib/xmerl-1.2.8/include/xmerl.hrl").
-export([t/0]).
	
-define(F, "f.xml").
	
t() ->
    {P1,_}=xmerl_scan:file(?F),
    {_, _, _, _, _, _, _, _, Q9, _, _, _} = P1,
    [_, _, _, _, _, R6, _]=Q9,
    R6,
    S=xmerl:export_simple(
    	[
    		{xmlText,[{emp,1}],1,[],"\n",text},
    		{xmlElement,emp,emp,[],
            {xmlNamespace,[],[]},
            [],1,[],
            [
            	{xmlText,[{emp,1}],5,[],"\n",text},
            	R6,
            	{xmlText,[{emp,1}],7,[],"\n",text}
            ],
            [],".",undeclared}
        ],
    xmerl_xml),
%    lists:flatten(S)
	io:format("~s~n", [S]).


$ erl
Erlang R14B03 (erts-5.8.4) [source] [smp:4:4] [rq:4] [async-threads:0]
[hipe] [kernel-poll:false]

Eshell V5.8.4  (abort with ^G)
1> c(px).
{ok,px}
2> px:t().
<?xml version="1.0"?>
<emp>
<address>
<street>Street 1</street>
<country>Country 1</country>
</address>
</emp>
ok
3>


lines such as:

{xmlText,[{emp,1}],1,[],"\n",text},

were put in for line feeds for viewing purposes, they are not
necessary for real processing.

references:

http://www.erlang.org/doc/apps/xmerl/xmerl_ug.html
http://www.erlang.org/doc/man/xmerl.html
http://stackoverflow.com/questions/1227241/building-an-xmerl-document-in-erlang


-wes