How do I validate an XML with a schema file that imports another schema file?

Question

I want to validate XML files against this schema (that is inside the zip); it imports two other XSD files.

   <import namespace="http://www.w3.org/2000/09/xmldsig#" 
       schemaLocation="xmldsig-core-schema.xsd"/>
   <import namespace="http://www.w3.org/2001/04/xmlenc#" 
       schemaLocation="xenc-schema.xsd"/>

The 2 files are also available here:

On validation, I get this error:

Src-resolve: Cannot Resolve The Name 'xenc:EncryptedData' To A(n) 'element Declaration' Component.

My validation/unmarshalling code looks like this (using moxy as a JAXB provider):

jaxbContext = JAXBContext.newInstance(type.getRequestType().getPackage().getName());
Unmarshaller um = jaxbContext.createUnmarshaller();

SchemaFactory sf = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
Schema schema = sf.newSchema(new StreamSource(this.getClass().getResourceAsStream("/xsd/" + type.getXsdName())));
um.setSchema(schema);

root = um.unmarshal(new StreamSource(new ByteArrayInputStream(xmlData)), type.getRequestType());

Before you ask what does the type do: I wrote code that could import all types of invoices from http://www.forum-datenaustausch.ch/. But versions 4.3 and above use the two additional schema files. How can validate the XML files?

score 5 · Accepted Answer · edited May 23 '17 at 12:13

Have a look at the accepted answer for this post. Based on the little I can see in your post, and from what I can remember, the problem with the way you're loading the XSD has to do with the fact that doing it your way, the factory doesn't get a base uri, hence it can't apply its smarts to resolve references to the other two XSDs. I have to assume that your other two XSDs are also packed as resources in the same jar, in the same directory.

I have to admit that I am intrigued by the error message, which seems to imply the schema it loaded is valid, so it might be an XML issue; if the above doesn't help you, then you should consider posting the offending XML as well...

UPDATE: As per my comments, it is working as described. See code snippet below:

SchemaFactory schemaFactory = SchemaFactory.newInstance("http://www.w3.org/2001/XMLSchema");
Schema compiledSchema = schemaFactory.newSchema(new SOTests().getClass()
    .getClassLoader().getResource("generalInvoiceRequest_430.xsd"));
Validator validator = compiledSchema.newValidator();
try {
    validator.validate(new StreamSource("D:\\...\\dentist_ersred_TG_430.xml"));
    System.out.println("Valid.");
}
catch (SAXException ex) {
    System.out.print("Not valid because..." + ex.getMessage());
}

You don't need to load more than the first XSD, and you shouldn't, since all the imports provide hints to the schema location.

enter image description here

The XSD files are all in the same directory in the generated jar, and they must be, since the relative URIs used for imports indicate same parent.

enter image description here

The program output with one of the files downloaded from here:

Valid.

And after introducing invalid content:

Not valid because...cvc-complex-type.2.4.a: Invalid content was found starting with element 'wrong'. One of '{"http://www.forum-datenaustausch.ch/invoice":processing}' is expected.

My recommendations to who reads this:

use getResource() to get an URL; as I've said above, a StreamResource doesn't have a base URI, hence relative references as per your xsd:import schemaLocation attribute cannot be de-referenced.
Let the schema/factory do the loading for you, when they're explicitly provided.
make sure that when provided, relative references match the folder structure in your jar file.

both the xsds and the xmls are given and both are from the same "official" source http://www.forum-datenaustausch.ch/. So it is most likely no problem in xsd or xml. But in the post you referenced i see that schema factory could take more than one xsd - i think that's the solution. i'll try. — dermoritz, Mar 26 '13 at 08:07
i just tried to load all schemas in schema factory but the error persists. On the other hand if i try to validate the xml online i got the same error - so i don't know if schemas were loaded and used correctly?! — dermoritz, Mar 26 '13 at 10:07
@dermoritz, did you try exactly the way described in the post, and did you put *all* the XSDs in the same folder in your jar? — Petru Gardea, Mar 26 '13 at 12:37
yeah - but as i stated in my answer: the cause of the problem was the order in which the schemes are added to the array. — dermoritz, Mar 28 '13 at 14:51
@dermoritz, I've tried it and it works as previously described; I've updated my response with the exact code I've used to test... — Petru Gardea, Mar 28 '13 at 17:54
ok i got it: the problem was i used "getResourceAsStream" (works only if loaded all schema in correct order) instead of getResource - this works as you described. probably it would be good to underline "Use getResource" and don't use "getResourceAsStream" - thx! — dermoritz, Apr 08 '13 at 11:28

score -1 · Answer 2 · edited Nov 05 '13 at 08:57

Similar problems here. I tried to import the GeneralInvoice into an integration Software.

Parser didn't like the DOCTYPE tag at the start of the import schemas. Solution: deleted the DOCTYPE section.
Parser didn't lke anyAttribute, anyURI etc. Solution: changed anyURI to string and removed other stuff by putting comments around.
Had to import the xenc and xwldsig xsd's first and then import GeneralInvoice in a second step.

Hope this helps

How do I validate an XML with a schema file that imports another schema file?

2 Answers2