ph-schematron/src/main/java/com/helger/schematron/SchematronHelper.java
@Nullable
  public static SchematronOutputType applySchematron (@Nonnull final ISchematronResource aSchematron,
                                                      @Nonnull final IReadableResource aXML)
  {
    ValueEnforcer.notNull (aSchematron, "SchematronResource");
    ValueEnforcer.notNull (aXML, "XMLSource");

    try
    {
      // Apply Schematron on XML
      return aSchematron.applySchematronValidationToSVRL (aXML);
    }
    catch (final Exception ex)
    {
      throw new IllegalArgumentException ("Failed to apply Schematron " +
                                          aSchematron.getID () +
                                          " onto XML resource " +
                                          aXML.getResourceID (),
                                          ex);
    }
  }
@Nullable
  public static SchematronOutputType applySchematron (@Nonnull final ISchematronResource aSchematron,
                                                      @Nonnull final IReadableResource aXML)
  {
    ValueEnforcer.notNull (aSchematron, "SchematronResource");
    ValueEnforcer.notNull (aXML, "XMLSource");

    try
    {
      // Apply Schematron on XML
      return aSchematron.applySchematronValidationToSVRL (aXML);
    }
    catch (final Exception ex)
    {
      throw new IllegalArgumentException ("Failed to apply Schematron " +
                                          aSchematron.getID () +
                                          " onto XML resource " +
                                          aXML.getResourceID (),
                                          ex);
    }
  }
Apply the passed schematron on the passed XML resource using a custom error
handler.

@param aSchematron
The Schematron resource. May not be <code>null</code>.
@param aXML
The XML resource. May not be <code>null</code>.
@return <code>null</code> if either the Schematron or the XML could not be
read.
@throws IllegalStateException
if the processing throws an unexpected exception.