Re: [xml-dev] Instance from Schema?

[James Fuller <jim.fuller@ruminate.co.uk>]

Dave Pawson wrote:

>On Thu, 2005-06-23 at 13:40 +0200, James Fuller wrote:
>
>  
>
>>sun msv will generate random or not random instances of data based on a
>>variety of supplied schemas...though be warned its a bit fiddly.
>>    
>>
>
>As in...
>  I couldn't get it to work at all Jim?
>
>rng Schema, it kept giving me an exception.
>  
>
sorry wasnt super clear in last post

I use it in the context of Sun's XML instance generator (which uses
MSV)...once u get it working its great for creating huge numbers of test
cases (lets say xslt)

get it from here
http://www.sun.com/software/xml/developers/instancegenerator/

here is an ant snippet for running it

<java fork="true" jar="../lib/xmlgen4/xmlgen.jar" failonerror="no">


    <!-- if not set you wont see important error messages! -->
    <arg value="-warning"/>

    <!-- set number of instances you want generated -->
    <arg value="-n"/>
    <arg value="100"/>

    <!-- set namespaced root element, this is crucial! -->
    <arg value="-root"/>
    <arg value="{http://www.w3.org/1999/XSL/Transform}stylesheet"/>

    <!-- i use dtd -->
    <arg value="-dtd"/>
    <arg value="../etc/simple-xslt.dtd"/>

    <!-- provide filename template, where dollar sign gets replaced with
instance number -->
    <arg value="instance/test.$.xslt"/>

    <!-- explicitly tell Ant dependencies -->
    <classpath>
        <pathelement location="../lib/xmlgen4/xsdlib.jar"/>
        <pathelement location="../lib/xmlgen4/isorelax.jar"/>
        <pathelement location="../lib/xmlgen4/msv.jar"/>
        <pathelement location="../lib/xmlgen4/relaxngDatatype.jar"/>
        <pathelement location="../lib/xmlgen4/xercesImpl.jar"/>
        <pathelement location="../lib/xmlgen4/xml-apis.jar"/>
        <pathelement location="../lib/xmlgen4/xmlgen.jar"/>
</classpath>
</java>


note the -root switch needs to have namespace or nothing works...in fact
I couldnt get anything working without a namespace..there is some real
weirdness going on with this....but got it working in the end with these
settings.

 I use a simple dtd (though this works with RelaxNG and XML Schema)
which is a 'cut down' version of the complete XSLT language

hth, Jim Fuller

have included dtd below.

simple-xslt.dtd
------------------------------------------------------------------------------------------------------------

 <!ENTITY % result-elements " ns2:a | ns2:b | ns2:c | ns2:d">
 
 <!ENTITY % char-instructions "
   xsl:for-each
 | xsl:value-of
 | xsl:copy-of
 | xsl:choose
 | xsl:if
 | xsl:copy
 | xsl:variable
 ">

  <!ENTITY % char-instructions-for-param "
  xsl:for-each
  | xsl:value-of
  | xsl:copy-of
  | xsl:choose
  | xsl:if
  | xsl:copy
  ">
 
 <!ENTITY % instructions "
 %char-instructions;
 | xsl:element
 ">
 
 <!ENTITY % char-template "
 %char-instructions;
 ">
 
 <!ENTITY % template "
 %instructions; |
 %result-elements;
 ">
 
 <!ENTITY % top-level "
   xsl:variable?
 | xsl:param?
 | xsl:template+
 ">
 
 <!-- Used for the type of an attribute value that is a URI reference.-->
 <!ENTITY % URI "CDATA">
 
 <!-- Used for the type of an attribute value that is a pattern.-->
 <!ENTITY % pattern "CDATA">
 
 <!-- Used for the type of an attribute value that is an
 attribute value template.-->
 <!ENTITY % avt "(ns2:a1 ns2:a2 ns2:a3 ns2:a4 ns2:a5)">
 
 <!-- Used for the type of an attribute value that is a QName; the prefix
 gets expanded by the XSLT processor. -->
 <!ENTITY % qname "(q1 q2 q3 q4 q5 q6 q7 q8 q9)">
 
 <!-- Like qname but a whitespace-separated list of QNames. -->
 <!ENTITY % qnames "(qn1 qn2 qn3 qn4 qn5 qn6 qn7 qn8 qn9)">
 
 <!-- Used for the type of an attribute value that is an expression.-->
 <!ENTITY % expr "( %result-elements; | --SLASH-- )">
 <!ENTITY % testexpr "( %result-elements; )">
 
 <!-- Used for the type of an attribute value that consists
 of a single character.-->
 <!ENTITY % char "CDATA">
 

 <!-- ........................................................... -->
 
 <!ELEMENT ns2:a (%template;)*>
 <!ELEMENT ns2:b (%template;)*>
 <!ELEMENT ns2:c (%template;)*>
 <!ELEMENT ns2:d (%template;)*>
 
 <!-- ........................................................... -->
 
<!ELEMENT xsl:stylesheet (%top-level;)*>
<!ATTLIST xsl:stylesheet
  xsl:version (2.0) #REQUIRED
  xmlns:xsl CDATA #FIXED "http://www.w3.org/1999/XSL/Transform";
  xmlns:ns2 CDATA #FIXED "http://www.ruminate.co.uk/test";
  >
 
<!ELEMENT xsl:template ( %instructions; | %result-elements; | xsl:param)* >
<!ATTLIST xsl:template
xsl:match %expr; #REQUIRED
 >

<!ELEMENT xsl:value-of EMPTY>
<!ATTLIST xsl:value-of
 xsl:select %expr; #REQUIRED
 >
 
<!ELEMENT xsl:copy-of EMPTY>
<!ATTLIST xsl:copy-of
 xsl:select %expr; #REQUIRED>
 
 <!ELEMENT xsl:apply-templates (xsl:sort|xsl:with-param)*>
 <!ATTLIST xsl:apply-templates
 xsl:select %expr; #REQUIRED
 >
 
 <!ELEMENT xsl:if EMPTY>
 <!ATTLIST xsl:if
 xsl:test %testexpr; #REQUIRED >
 
 <!ELEMENT xsl:for-each
 (%result-elements;
 | xsl:sort)*
 >
 
 <!ATTLIST xsl:for-each
 xsl:select %expr; #REQUIRED
 >
 
 <!ELEMENT xsl:sort EMPTY>
 <!ATTLIST xsl:sort
 xsl:select %expr; "."
 >
 
 <!ELEMENT xsl:choose (xsl:when+, xsl:otherwise?)>
 
 <!ELEMENT xsl:when (%template;)*>
 <!ATTLIST xsl:when
 xsl:test %testexpr; #REQUIRED
 >
 
 <!ELEMENT xsl:otherwise (%template;)*>
 
 <!ELEMENT xsl:variable  (%template;)*>
 <!ATTLIST xsl:variable
 xsl:name %qname; #REQUIRED
 >
 
 <!ELEMENT xsl:param  (%char-instructions-for-param;)*>
 <!ATTLIST xsl:param
 xsl:name %qname; #REQUIRED
 >
 
 <!ELEMENT xsl:element  (xsl:attribute+ | %template;)*>
 <!ATTLIST xsl:element
 xsl:name %avt; #REQUIRED 
 >
 
 <!ELEMENT xsl:attribute (%char-template;)*>
 <!ATTLIST xsl:attribute
 xsl:name %avt; #REQUIRED
 >
 
 <!ELEMENT xsl:copy  (%template;)*>
 
 <!ELEMENT xsl:with-param (%template;)*>
 <!ATTLIST xsl:with-param
 xsl:name %qname; #REQUIRED
 xsl:select %expr; #REQUIRED
 >