[erlang-questions] \bclarify: Exception on erlsom:write_xsd_hrl_file for XMLSchema

Willem de Jong <>
Sun Jun 7 16:05:00 CEST 2009


Hi Mike,

This is caused by the fact that the XSD contains a group and an element with
the same name. This causes a conflict. It can be solved by telling Erlsom to
put a prefix in front of one of them. If you try

erlsom:write_xsd_hrl_file("soap-1.1-encoding.xsd","hrl.hrl", [{group_prefix,
"G:"}]).
then it works. I tried to explain this in the documentation, but I have to
admit that it remains a bit of an obscure feature...

Regards,
Willem

On Sat, Jun 6, 2009 at 4:15 PM, Mike Ziebeck <> wrote:

> Willem de Jong schrieb:
>
>> Hello Mike,
>>  If I understand correctly, most of your tests are using a WSDL file as
>> input for the erlsom:write_xsd_hrl_file() function. That doesn't work,
>> because this function expects an XSD as its input.
>>
> Hello Willem,
>
> indeed. My fault. Because of the in-document schema definition of those
> WSDL
> files I was a little too optimistic erlsom:write_xsd_hrl_file() could do
> the
> job. So for now I've got an other real world .xsd that erlsom cannot
> handle.
> It's the SOAP 1.1 .XSD found here:
> http://schemas.xmlsoap.org/soap/encoding/
> resulting in:
>
> erlsom_test: write_xsd_hrl_file_test_ (info: not working)...*failed*
> ::throw:{error,"Group or anonymous sequence nested too deep"}
>  in function erlsom_writeHrl:writeXsdHrlFile/2
>  in call from erlsom:write_xsd_hrl_file/3
>
> To reproduce that using eunit-2.1.1. see the attached unit testing
> modul.
>
> Regards,
> Mike
>
> -- Output as follows:
> =======================================================
> Erlang R13B (erts-5.7.1) [smp:2:2] [rq:2] [async-threads:0]
>
> ()1> erlsom_test:test().
> erlsom_test: write_xsd_hrl_file_test_ (info: not working)...*failed*
> ::throw:{error,
>         [{exception,{error,{"2 - Unexpected event, expected end-tag"}}},
>          {stack,[schemaType]},
>          {received,
>              {startElement,"http://www.w3.org/2001/XMLSchema","notation",
>                  "xs",
>                  [{attribute,"system",[],[],
>                       "http://www.w3.org/2000/08/XMLSchema.xsd"},
>                   {attribute,"public",[],[],[...]},
>                   {attribute,"name",[],[],...}]}}]}
>  in function erlsom_writeHrl:writeXsdHrlFile/2
>  in call from erlsom:write_xsd_hrl_file/3
>
>
> erlsom_test: write_xsd_hrl_file_test_ (info: not working)...*failed*
> ::throw:{error,"Group or anonymous sequence nested too deep"}
>  in function erlsom_writeHrl:writeXsdHrlFile/2
>  in call from erlsom:write_xsd_hrl_file/3
>
>
> =======================================================
>  Failed: 2.  Skipped: 0.  Passed: 7.
> error
>
>
> %%%
> ===========================================================================
> %%% Author © 2009: Mike Ziebeck
> %%% Description:   unit tests for erlsom
> %%% Created:       06.06.2009
> %%%
> ===========================================================================
> -module(erlsom_test).
>
> %%
> %% Include files
> %%
> -include_lib("eunit/include/eunit.hrl").
>
> %%
> %% Exported Functions
> %%
>
> %%
> %% API Functions
> %%
>
> %%
> %% Description: try to write_xsd_hrl_file using some real world .XSD's
> %%
> write_xsd_hrl_file_test_() ->
>        [{timeout, 5000, {"info: working", fun() -> write_xsd_hrl_file_test(
>          {"xml","http://www.w3.org/2009/01/xml.xsd",[]}) end}},
>         {timeout, 5000, {"info: working", fun() -> write_xsd_hrl_file_test(
>          {"soap_envelope12","http://www.w3.org/2003/05/soap-envelope",
>           [{include_files, [{"http://www.w3.org/XML/1998/namespace","xs","xml.xsd"}]}]})
> end}},
>         {timeout, 5000, {"info: working", fun() -> write_xsd_hrl_file_test(
>          {"soap_envelope11","http://schemas.xmlsoap.org/soap/envelope/",[]})
> end}},
>         {timeout, 5000, {"info: working", fun() -> write_xsd_hrl_file_test(
>          {"soap_encoding12","http://www.w3.org/2003/05/soap-encoding",[]})
> end}},
>     {timeout, 5000, {"info: working", fun() -> write_xsd_hrl_file_test(
>          {"xml_schema_hfp","
> http://www.w3.org/2001/XMLSchema-hasFacetAndProperty",[]}) end}},
>         {timeout, 5000, {"info: working", fun() -> write_xsd_hrl_file_test(
>          {"xhtml","http://www.w3.org/1999/xhtml.xsd",[]}) end}},
>     {timeout, 5000, {"info: working", fun() -> write_xsd_hrl_file_test(
>          {"xml_schema_instance","http://www.w3.org/2001/XMLSchema-instance",[]})
> end}},
>         {timeout, 5000, {"info: not working", fun() ->
> write_xsd_hrl_file_test(
>          {"xml_schema","http://www.w3.org/2001/XMLSchema.xsd",
>           [{include_files, [{"http://www.w3.org/XML/1998/namespace","xs","xml.xsd"}]}]})
> end}},
>     {timeout, 5000, {"info: not working", fun() -> write_xsd_hrl_file_test(
>      {"soap_encoding11","http://schemas.xmlsoap.org/soap/encoding/",[]})
> end}}
>    ].
>
> %%
> %% Local Functions
> %%
>
> %%
> %% Description: .XSD download & compile into .hrd via write_xsd_hrl_file
> %%
> write_xsd_hrl_file_test({Prefix, Url, Options}) ->
>        inets:start(),
>    FileName = filename:join([filename:dirname(code:which(?MODULE)),
> Prefix]),
>        {ok, {{"HTTP/1.1", 200, "OK"}, _HeadRcv, Body}} = http:request(Url),
>        file:write_file(FileName++".xsd", list_to_binary(Body)),
>        erlsom:write_xsd_hrl_file(FileName++".xsd", FileName++".hrl",
> Options).
>


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