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| Re: xsd2ttcn and Relax NG schema [message #1792035 is a reply to message #1792021] |
Tue, 10 July 2018 11:41   |
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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 12:09] Report message to a moderator |
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