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Posted to j-users@xerces.apache.org by Neil Blue <Ne...@denovopharma.com> on 2004/04/23 10:55:20 UTC

>> Grammar parser getting started help please.

Hello,

I am using xerces 2.6.2, and I am trying to preparse a schema. Here is the test code that I am using:

import org.apache.xerces.xni.parser.*;
import org.apache.xerces.parsers.*;
import org.apache.xerces.xni.grammars.*;
import java.io.*;

public class PSVITest
{
    public static void main(String[] args)
	throws Exception
    {
	System.out.println("PSVI Test");
	XMLInputSource in = new XMLInputSource(null, null, null);
	in.setCharacterStream(new FileReader("test.xsd"));
	XMLGrammarPreparser parser = new XMLGrammarPreparser();
	Grammar grammar = parser.preparseGrammar(XMLGrammarDescription.XML_SCHEMA
						 ,in);
	System.out.println(grammar);
    }
}

Schema file:

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.w3schools.com"
xmlns="http://www.w3schools.com"
elementFormDefault="qualified">

<xs:element name="note">
    <xs:complexType>
      <xs:sequence>
	<xs:element name="to" type="xs:string"/>
	<xs:element name="from" type="xs:string"/>
	<xs:element name="heading" type="xs:string"/>
	<xs:element name="body" type="xs:string"/>
      </xs:sequence>
    </xs:complexType>
</xs:element>

</xs:schema>

This just produces null outputs:

PSVI Test
null

Please can anyone tell me how I can produce a parsed schema grammar?

Thanks
Neil Blue

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Re: >> Grammar parser getting started help please.

Posted by Michael Glavassevich <mr...@apache.org>.
Hello,

An XMLGrammarLoader for schemas needs to be registered with the
XMLGrammarPreparser. Have a look at the xni.XMLGrammarBuilder sample. You
can register the built-in schema loader like this:

parser.registerPreparser(XMLGrammarDescription.XML_SCHEMA, null);

Hope that helps.

On Fri, 23 Apr 2004, Neil Blue wrote:

> Hello,
>
> I am using xerces 2.6.2, and I am trying to preparse a schema. Here is the test code that I am using:
>
> import org.apache.xerces.xni.parser.*;
> import org.apache.xerces.parsers.*;
> import org.apache.xerces.xni.grammars.*;
> import java.io.*;
>
> public class PSVITest
> {
>     public static void main(String[] args)
> 	throws Exception
>     {
> 	System.out.println("PSVI Test");
> 	XMLInputSource in = new XMLInputSource(null, null, null);
> 	in.setCharacterStream(new FileReader("test.xsd"));
> 	XMLGrammarPreparser parser = new XMLGrammarPreparser();
> 	Grammar grammar = parser.preparseGrammar(XMLGrammarDescription.XML_SCHEMA
> 						 ,in);
> 	System.out.println(grammar);
>     }
> }
>
> Schema file:
>
> <?xml version="1.0"?>
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
> targetNamespace="http://www.w3schools.com"
> xmlns="http://www.w3schools.com"
> elementFormDefault="qualified">
>
> <xs:element name="note">
>     <xs:complexType>
>       <xs:sequence>
> 	<xs:element name="to" type="xs:string"/>
> 	<xs:element name="from" type="xs:string"/>
> 	<xs:element name="heading" type="xs:string"/>
> 	<xs:element name="body" type="xs:string"/>
>       </xs:sequence>
>     </xs:complexType>
> </xs:element>
>
> </xs:schema>
>
> This just produces null outputs:
>
> PSVI Test
> null
>
> Please can anyone tell me how I can produce a parsed schema grammar?
>
> Thanks
> Neil Blue
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: xerces-j-user-unsubscribe@xml.apache.org
> For additional commands, e-mail: xerces-j-user-help@xml.apache.org
>
>

---------------------------
Michael Glavassevich
XML Parser Development
IBM Toronto Lab
E-mail: mrglavas@ca.ibm.com
E-mail: mrglavas@apache.org

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