| xsd2ttcn and Relax NG schema [message #1792021] |
Tue, 10 July 2018 03:47  |
Eclipse User |
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Dear All,
I would known if xsd2ttcn tool support native NG Relax schema as defined by OASIS or it's XML schema equivalent (e.g. RFC 5222 Annex A)?
Many thanks in advance,
Best Regards,
Yann
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| Re: xsd2ttcn and Relax NG schema [message #1792035 is a reply to message #1792021] |
Tue, 10 July 2018 07:41  |
| Eclipse User |
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Hi Yann,
it does not support it directly; however there's a workflow that can be applied , but it will require some tweaking:
there is a tool Trang (http://www.thaiopensource.com/relaxng/trang.html) which converts RelaxNG XML into the corresponding XML Schema (XSD); from here on xsd2ttcn can be used.
However please be aware that Trang , as well as xsd2ttcn have their own idiosyncrasies, not all conversions are perfect so one will need to add some effort into it.
Let's consider the attached simple example:
-the RelaxNG XML (simpledc.rng) can be converted with Trang:
trang -I rng -O xsd simpledc.rng simpledc.xsd
However note here that Trang during the conversion loses the target namespace so I had to add that manually.
in simpledc.xsd:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="http://relaxng.org/ns/structure/1.0" xmlns="http://relaxng.org/ns/structure/1.0" elementFormDefault="qualified">
<xs:element name="dc">
:
:
From here on
xsd2ttcn simpledc.xsd
makefilegen *.ttcn
make
will work smoothly; the resulting TTCN-3 module looks credible:
module http_relaxng_org_ns_structure_1_0 {
import from XSD all;
type record Dc
{
Creator creator,
Title title,
Date date,
record of Publisher publisher_list,
record of Source source_list,
record of Description description_list,
record of Subject subject_list,
record of Coverage coverage_list,
record of Contributor contributor_list,
record of Identifier identifier_list,
record of Relation relation_list,
record of Rights rights_list,
record of Language language_list,
record of Type type_list,
record of Format format_list
}
with {
variant "name as uncapitalized";
variant "element";
variant (publisher_list) "untagged";
variant (publisher_list[-]) "name as 'publisher'";
variant (source_list) "untagged";
variant (source_list[-]) "name as 'source'";
variant (description_list) "untagged";
variant (description_list[-]) "name as 'description'";
variant (subject_list) "untagged";
variant (subject_list[-]) "name as 'subject'";
variant (coverage_list) "untagged";
variant (coverage_list[-]) "name as 'coverage'";
variant (contributor_list) "untagged";
variant (contributor_list[-]) "name as 'contributor'";
variant (identifier_list) "untagged";
variant (identifier_list[-]) "name as 'identifier'";
variant (relation_list) "untagged";
variant (relation_list[-]) "name as 'relation'";
variant (rights_list) "untagged";
variant (rights_list[-]) "name as 'rights'";
variant (language_list) "untagged";
variant (language_list[-]) "name as 'language'";
variant (type_list) "untagged";
variant (type_list[-]) "name as 'type'";
variant (format_list) "untagged";
variant (format_list[-]) "name as 'format'";
};
type XSD.String Creator
with {
variant "name as uncapitalized";
variant "element";
};
type XSD.String Title
with {
variant "name as uncapitalized";
variant "element";
};
type XSD.String Date
with {
variant "name as uncapitalized";
variant "element";
};
type XSD.String Publisher
with {
variant "name as uncapitalized";
variant "element";
};
type XSD.String Source
with {
variant "name as uncapitalized";
variant "element";
};
type XSD.String Description
with {
variant "name as uncapitalized";
variant "element";
};
type XSD.String Subject
with {
variant "name as uncapitalized";
variant "element";
};
type XSD.String Coverage
with {
variant "name as uncapitalized";
variant "element";
};
type XSD.String Contributor
with {
variant "name as uncapitalized";
variant "element";
};
type XSD.String Identifier
with {
variant "name as uncapitalized";
variant "element";
};
type XSD.String Relation
with {
variant "name as uncapitalized";
variant "element";
};
type XSD.String Rights
with {
variant "name as uncapitalized";
variant "element";
};
type XSD.String Language
with {
variant "name as uncapitalized";
variant "element";
};
type XSD.String Type
with {
variant "name as uncapitalized";
variant "element";
};
type XSD.String Format
with {
variant "name as uncapitalized";
variant "element";
};
}
with {
encode "XML";
variant "namespace as 'http://relaxng.org/ns/structure/1.0'";
variant "controlNamespace 'http://www.w3.org/2001/XMLSchema-instance' prefix 'xsi'";
variant "elementFormQualified";
}
compared to the initial .rng file :
<?xml version="1.0" encoding="UTF-8"?>
<element name="dc" xmlns="http://relaxng.org/ns/structure/1.0">
<element name="creator">
<text />
</element>
<element name="title">
<text />
</element>
<element name="date">
<text />
</element>
<zeroOrMore>
<element name="publisher">
<text />
</element>
</zeroOrMore>
<zeroOrMore>
<element name="source">
<text />
</element>
</zeroOrMore>
<zeroOrMore>
<element name="description">
<text />
</element>
</zeroOrMore>
<zeroOrMore>
<element name="subject">
<text />
</element>
</zeroOrMore>
<zeroOrMore>
<element name="coverage">
<text />
</element>
</zeroOrMore>
<zeroOrMore>
<element name="contributor">
<text />
</element>
</zeroOrMore>
<zeroOrMore>
<element name="identifier">
<text />
</element>
</zeroOrMore>
<zeroOrMore>
<element name="relation">
<text />
</element>
</zeroOrMore>
<zeroOrMore>
<element name="rights">
<text />
</element>
</zeroOrMore>
<zeroOrMore>
<element name="language">
<text />
</element>
</zeroOrMore>
<zeroOrMore>
<element name="type">
<text />
</element>
</zeroOrMore>
<zeroOrMore>
<element name="format">
<text />
</element>
</zeroOrMore>
</element>
I have also tried to convert the Annex A you have mentioned as an RNG file;
(see also attached)
but when running xsd2ttcn, it throws a number of errors saying that "The content model is not deterministic".
This can be reduced to this code snippet:
<xs:group name="notLost">
<xs:annotation>
<xs:documentation>
Any element not in the LoST namespace.
</xs:documentation>
</xs:annotation>
<xs:choice>
<!-- xs:any namespace="##other" processContents="skip"/-->
<xs:any namespace="##local" processContents="skip"/>
</xs:choice>
</xs:group>
which apparently leads to a contradictory definition , unless one of the any namespace definitions are removed.
Also, there seems to be a problem with
<xs:attributeGroup name="expires">
<xs:attribute name="expires" use="required">
<!--xs:simpleType>
<xs:union memberTypes="xs:dateTime">
<xs:simpleType>
<xs:restriction base="xs:token">
<xs:enumeration value="NO-CACHE"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType>
<xs:restriction base="xs:token">
<xs:enumeration value="NO-EXPIRATION"/>
</xs:restriction>
</xs:simpleType>
</xs:union>
</xs:simpleType-->
</xs:attribute>
</xs:attributeGroup>
that has to be looked into.
But with these fixes ( the lines which are commented out ) it compiles.
Of course the details have to be ironed out but there seems to be a usable workflow.
I hope this helps
Best regards
Elemer
[Updated on: Tue, 10 July 2018 08:09] by Moderator |
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