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xsd2ttcn issue [message #1783794]

Sat, 17 March 2018 19:18

Yann Garcia

Messages: 145
Registered: June 2016

Senior Member

Hello All,

I got two issues while converting XSD file into TTCN file:
1) The following XSD documents seems to be unresolved but they are accessible:
- I/O error : Attempt to load network entity http://www.w3.org/2001/xml.xsd
WARNING:
/home/ubuntu/TriesAndDelete/etsi_emtel/xsd/xsd/pemea.xsd (in line 19): Element '{http://www.w3.org/2001/XMLSchema}import': Failed to locate a schema at location 'http://www.w3.org/2001/xml.xsd'. Skipping the import.
WARNING:
- wifi.xsd (in type import): The 'http://www.opengis.net/gml' specified in the 'namespace' attribute is not resolvable.
2) the generated TTCN files contains strange variant such as:

type record of enumerated
{
  device,
  lis,
  other
} SourceType
with {
  variant ([-]) ;
  variant ([-]) ;
  variant ([-]) ;
  variant "name as uncapitalized";
  variant "list";
};
}
with {
  encode "XML";
  variant "namespace as 'urn:ietf:params:xml:ns:pidf:geopriv10:lmsrc' prefix 'lmsrc'";
  variant "controlNamespace 'http://www.w3.org/2001/XMLSchema-instance' prefix 'xsi'";
  variant "elementFormQualified";
}

This one is not a blocking issue because I can remove suspicious variant.

I have attached the XSD files I'm using.

Thanks a lot for your support,

Yann

Attachment: xsd.tar
(Size: 60.00KB, Downloaded 63 times)

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Re: xsd2ttcn issue [message #1783797 is a reply to message #1783794]

Sun, 18 March 2018 07:21

Elemer Lelik

Messages: 1120
Registered: January 2015

Senior Member

Hi Yann,

let me start with #2: you can safely remove the weird variants , they are some parasitic artifacts:

type record of enumerated
{
	device,
	lis,
	other
} SourceType
with {
//  variant ([-]) ;
//  variant ([-]) ;
//  variant ([-]) ;
  variant "name as uncapitalized";
  variant "list";
};

I have verified the encoding and it looks correct, e.g.

var Source  v_Source:= {lis, device, lis, other, device, device, lis}

is encoded as:

"<lmsrc:source xmlns:lmsrc='urn:ietf:params:xml:ns:pidf:geopriv10:lmsrc'>lis device lis other device device lis</lmsrc:source>\n\n"

see also http://www.rfc-editor.org/rfc/rfc7105.txt

Now, #1.

The converter cannot follow links or hyperlinks, all XSD's have to be present and located in the same directory. This means that import links and hyperlinks will have to be replaced with a direct local reference.

So in pemea.xsd

  <xs:import namespace="http://www.w3.org/XML/1998/namespace"   
             schemaLocation= "http://www.w3.org/2001/xml.xsd" />

has to be replaced with

 <xs:import namespace="http://www.w3.org/XML/1998/namespace"   
             schemaLocation= "xml.xsd" />

This will solve your first issue.

I have attached the generated (and corrected files), see package1.tgz.

Now, the second issue is somewhat more complicated.

wifi.xsd tries to import the gml namespace:

     <xs:import namespace="http://www.opengis.net/gml"/>

but , as there is no .xsd file present with that namespace, a warning is thrown.
Now as no definition from that namespace is being referred to, this is just a warning,
not an error, and the TTCN-3 files will be generated.

There are two options here:
if you don't need gml ( https://en.wikipedia.org/wiki/Geography_Markup_Language ) then you can continue with the package1 I have uploaded.

If you do need gml , then, as there are several variants, you have to decide which variant you want to use and add the schemas for that variant to the conversion.

See all the variants here http://schemas.opengis.net/gml/

I hope this helps

Best regards
Elemer