exml is an Erlang library helpful with parsing XML streams and doing some basic XML structures manipulation.
exml is a rebar-compatible OTP application, run make or
./rebar compile in order to build it.
As a requirement, development headers for expat library are required.
exml can parse both XML streams as well as single XML documents at once.
To parse a whole XML document:
{ok, Parser} = exml:parse(<<"<my_xml_doc/>">>).To generate an XML document from Erlang terms:
El = #xmlel{name = <<"foo">>,
attrs = [{<<"attr1">>, <<"bar">>}],
children = [{xmlcdata, <<"Some Value">>}]},
exml:to_list(El).or (pastable into erl shell):
El = {xmlel, <<"foo">>,
[{<<"attr1">>, <<"bar">>}],
[{xmlcdata, <<"Some Value">>}]}.
exml:to_list(El).Which results in:
<foo attr1='bar'>Some Value</foo>exml:to_binary/1 works similarly.
There're also exml:to_pretty_iolist/1,3 for a quick'n'dirty document
preview (pastable into erl):
rr("include/exml.hrl").
El = #xmlel{name = <<"outer">>,
attrs = [{<<"attr1">>, <<"val1">>},
{<<"attr2">>, <<"val-two">>}],
children = [#xmlel{name = <<"inner-childless">>},
#xmlel{name = <<"inner-w-children">>,
children = [#xmlel{name = <<"a">>}]}]}.
io:format("~s", [exml:to_pretty_iolist(El)]).which prints:
<outer attr2='val-two' attr1='val1'>
<inner-childless/>
<inner-w-children>
<a/>
</inner-w-children>
</outer>For an example of using the streaming API see test/exml_stream_tests.erl.