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kenrobinson
Posted: Mon Apr 20, 2009 2:12 pm Reply with quote
User Joined: 20 Apr 2009 Posts: 12
Hello everyone.
Please forgive any lapse in etiquette in my first post to this forum.

I am trying to validate some xml documents. The schema is written in relaxNG notation. As erlang does not have (to the best of my knowledge) an xml parser which takes a relaxNG schema I have converted it to xsd format using trang.

I run in the following code in the REPL:

{ok, S} = xmerl_xsd:process_schema("xsd/jaus.xsd").

I then get the following error:

Error in process <0.31.0> with exit value: {{badmatch,{error,[{[],xmerl_xsd,{type_not_uniquely_defined_in_schema,{'_xmerl_no_name_',['_xmerl_no_name_',space],[]}}},{[],xmerl_xsd,{type_not_uniquely_defined_in_schema,{'_xmerl_no_name_',['_xmerl_no_name_',space],[]}}},{...

** exited: {{badmatch,
{error,
[{[],
xmerl_xsd,
{type_not_uniquely_defined_in_schema,
{'_xmerl_no_name_',['_xmerl_no_name_',space],[]}}},
{[],
xmerl_xsd,
{type_not_uniquely_defined_in_schema,
{'_xmerl_no_name_',['_xmerl_no_name_',space],[]}}},
{[],
xmerl_xsd,
{type_not_uniquely_defined_in_schema,
{'_xmerl_no_name_',
['_xmerl_no_name_',space],
[]}}}]}},
[{erl_eval,expr,3}]} **
5>

I see the attribute space defined in xml.xsd which is referred to in jaus.xsd. Is there some basic thing that I am missing. The xml.xsd and jaus.xsd files are below.

regards,
Ken.

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" targetNamespace="http://www.w3.org/XML/1998/namespace" xmlns:ns1="urn:jaus:jsidl:1.0">
<xs:import namespace="urn:jaus:jsidl:1.0" schemaLocation="jaus.xsd"/>
<xs:attribute name="space">
<xs:simpleType>
<xs:restriction base="xs:token">
<xs:enumeration value="default"/>
<xs:enumeration value="preserve"/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
</xs:schema>

<?xml version="1.0" encoding="UTF-8"?>
<!--
JAUS Service Interface Definition Language (JSIDLv1.0)
-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" targetNamespace="urn:jaus:jsidl:1.0" xmlns:ns1="urn:jaus:jsidl:1.0">
<xs:include schemaLocation="protocol_behavior.xsd"/>
<xs:include schemaLocation="message_set.xsd"/>
<xs:import namespace="http://www.w3.org/XML/1998/namespace" schemaLocation="xml.xsd"/>
<xs:element name="service_def">
<xs:complexType>
<xs:sequence>
<xs:element ref="ns1:description"/>
<xs:element ref="ns1:assumptions"/>
<xs:element minOccurs="0" ref="ns1:references"/>
<xs:element minOccurs="0" ref="ns1:declared_const_set"/>
<xs:element minOccurs="0" ref="ns1:declared_type_set"/>
<xs:element ref="ns1:message_set"/>
<xs:element ref="ns1:internal_events_set"/>
<xs:element ref="ns1:protocol_behavior"/>
</xs:sequence>
<xs:attribute name="name" use="required" type="ns1:identifier"/>
<xs:attribute name="id" use="required" type="xs:anyURI"/>
<xs:attribute name="version" use="required" type="ns1:version_num"/>
</xs:complexType>
</xs:element>
<xs:element name="description">
<xs:complexType mixed="true">
<xs:attribute ref="xml:space"/>
</xs:complexType>
</xs:element>
<xs:element name="assumptions">
<xs:complexType mixed="true">
<xs:attribute ref="xml:space"/>
</xs:complexType>
</xs:element>
<xs:element name="references">
<xs:complexType>
<xs:sequence>
<xs:element minOccurs="0" ref="ns1:inherits_from"/>
<xs:element minOccurs="0" maxOccurs="unbounded" ref="ns1:client_of"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="inherits_from">
<xs:complexType>
<xs:attributeGroup ref="ns1:ref_attr"/>
</xs:complexType>
</xs:element>
<xs:element name="client_of">
<xs:complexType>
<xs:attributeGroup ref="ns1:ref_attr"/>
</xs:complexType>
</xs:element>
<xs:attributeGroup name="ref_attr">
<xs:attribute name="name" use="required" type="ns1:identifier"/>
<xs:attribute name="id" use="required" type="xs:anyURI"/>
<xs:attribute name="version" use="required" type="ns1:version_num_ref"/>
<xs:attribute name="interpretation"/>
</xs:attributeGroup>
</xs:schema>


Ken.
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kenrobinson
Posted: Mon Apr 27, 2009 2:16 am Reply with quote
User Joined: 20 Apr 2009 Posts: 12
Hi Everyone,
As a sanity check I went to a Windows machine and tried the generated schema using Altova XML Spy. It stated jaus.xsd and it associated file were valid. What are the things that xmerl cannot do?
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kenrobinson
Posted: Thu Apr 30, 2009 2:15 pm Reply with quote
User Joined: 20 Apr 2009 Posts: 12
Hi All,

I tried specifying the directories to search for on the option list, otherwise it would try the uri. I now get a new error. I've listed my present directory. I then run the command. Any ideas?

8> ls().
#testjaus.xsd# jaus.xsd jaus.xsd~
jaus_xsd.beam jaus_xsd.erl jaus_xsd.erl~
message_set.xsd patterns.xsd protocol_behavior.xsd
testjaus.xsd xml.xsd
ok
9> xmerl_xsd:process_schema("jaus.xsd", [{fetch_path, "./"}]).
** exception error: no function clause matching
filename:join(46,"protocol_behavior.xsd")
in function xmerl_xsd:path_locate/3
in call from xmerl_xsd:fetch/2
in call from xmerl_xsd:fetch_external_schema/2
in call from xmerl_xsd:process_external_schema_once/3
in call from xmerl_xsd:element_content/3
in call from xmerl_xsd:traverse_content2/3
in call from xmerl_xsd:validate_schema/2
10>
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seanmc
Posted: Fri May 01, 2009 1:36 pm Reply with quote
User Joined: 03 Aug 2007 Posts: 10
Hi Ken,

I don't know much about these xml functions but I see the fetch_path option requires a list of paths, not just one.

ie, where you entered:
xmerl_xsd:process_schema("jaus.xsd", [{fetch_path, "./"}]).

it should have been:
xmerl_xsd:process_schema("jaus.xsd", [{fetch_path, ["./"]}]).

Sorry I can't contribute more, hope this much helps.
//Sean.
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kenrobinson
Posted: Fri May 15, 2009 1:25 pm Reply with quote
User Joined: 20 Apr 2009 Posts: 12
Hi,
Unfortunately after correctly specifying the right paths to look at it came up with a similar to what I had at first:
...
['_xmerl_no_name_',space],[]}}},
{[],
xmerl_xsd,
{type_not_uniquely_defined_in_schema,
{'_xmerl_no_name_',

My solution to the problem doesn't solve it in erlang but in python. I discovered that there was a python/erlang interface called Twotp. python has a libxml bindings which have a relaxng schema validator. I plan now to test that the xml is valid in python and then continue using the xml in erlang.

It's a case of not fixing the problem but avoiding it.
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klaar
Posted: Sun May 17, 2009 12:52 pm Reply with quote
User Joined: 06 Oct 2008 Posts: 11 Location: Göteborg/Sweden
Code:
<xs:include schemaLocation="protocol_behavior.xsd"/>
<xs:include schemaLocation="message_set.xsd"/>


Tried to replicate your results, but you did not provide these files. Would you mind attaching a zip/tarball? Smile
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kenrobinson
Posted: Sun May 17, 2009 1:41 pm Reply with quote
User Joined: 20 Apr 2009 Posts: 12
Hi klar,

Thanks for looking at this.
Attached is the xsd.tar.gz file containing all files required.

regards,
Ken.
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