dynamic generation of xml files from an xsd

Hi

I'm using Xmlbeans to create an xml editor. In this application you
normally have an xsd to create xml files that conform to that schema.
If I use xmlbeans at compile time there's no problem, I can generate
the xmlbeans clases and interfaces and begin using them, but I now
need to generate all this stuff at runtime, here's my initial code:
       ...
       // the schema
       XmlObject xmlobj = XmlObject.Factory.parse(new File(xsdFileName));
       XmlObject foo[] = { xmlobj };
       // the schema types:
       SchemaTypeLoader stl = XmlBeans.loadXsd(foo);

Now, my problem is that I don't know how to find the propiate root
document type to generate a new XML that conforms to the schema. I've
tried:

       SchemaType sType = stl.typeForClassname("com.name.try.TryDocument");
       XmlOptions options = new XmlOptions();
       XmlObject mydoc = stl.newInstance(sType, options);

with no success. The sType object is allways null and I don't know how
to get my schema root element to generate an xml file. My schema looks
something like this:

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";
        xmlns="http://name.com/try";
        targetNamespace="http://name.com/try";
        elementFormDefault="qualified" attributeFormDefault="unqualified">

        <xs:element name="Try" type="TemplateType"/>

        <xs:complexType name="TemplateType">
                <xs:sequence>
                        <xs:element name="First" type="FirstType"/>

...
</xs:schema>

My understanding is that if I use static generation of xmlbeans i
would have to search for a TryDocument interface and start from there.

Any help would be greatly appreciated.

Thanks

--
Javier