/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 2000 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xerces" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 1999, International
* Business Machines, Inc., http://www.apache.org. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.xerces.validators.schema;
import org.apache.xerces.framework.XMLErrorReporter;
import org.apache.xerces.validators.common.Grammar;
import org.apache.xerces.validators.common.GrammarResolver;
import org.apache.xerces.validators.common.GrammarResolverImpl;
import org.apache.xerces.validators.common.XMLElementDecl;
import org.apache.xerces.validators.common.XMLAttributeDecl;
import org.apache.xerces.validators.schema.SchemaSymbols;
import org.apache.xerces.validators.schema.XUtil;
import org.apache.xerces.validators.datatype.DatatypeValidator;
import org.apache.xerces.validators.datatype.DatatypeValidatorFactoryImpl;
import org.apache.xerces.validators.datatype.InvalidDatatypeValueException;
import org.apache.xerces.utils.StringPool;
import org.w3c.dom.Element;
//REVISIT: for now, import everything in the DOM package
import org.w3c.dom.*;
import java.util.*;
import java.net.URL;
import java.net.MalformedURLException;
//Unit Test
import org.apache.xerces.parsers.DOMParser;
import org.apache.xerces.validators.common.XMLValidator;
import org.apache.xerces.validators.datatype.DatatypeValidator.*;
import org.apache.xerces.validators.datatype.InvalidDatatypeValueException;
import org.apache.xerces.framework.XMLContentSpec;
import org.apache.xerces.utils.QName;
import org.apache.xerces.utils.NamespacesScope;
import org.apache.xerces.parsers.SAXParser;
import org.apache.xerces.framework.XMLParser;
import org.apache.xerces.framework.XMLDocumentScanner;
import org.xml.sax.InputSource;
import org.xml.sax.SAXParseException;
import org.xml.sax.EntityResolver;
import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXException;
import java.io.IOException;
import org.w3c.dom.Document;
import org.apache.xml.serialize.OutputFormat;
import org.apache.xml.serialize.XMLSerializer;
import org.apache.xerces.validators.schema.SchemaSymbols;
/**
* Instances of this class get delegated to Traverse the Schema and
* to populate the Grammar internal representation by
* instances of Grammar objects.
* Traverse a Schema Grammar:
* As of April 07, 2000 the following is the
* XML Representation of Schemas and Schema components,
* Chapter 4 of W3C Working Draft.
* <schema
* attributeFormDefault = qualified | unqualified
* blockDefault = #all or (possibly empty) subset of {equivClass, extension, restriction}
* elementFormDefault = qualified | unqualified
* finalDefault = #all or (possibly empty) subset of {extension, restriction}
* id = ID
* targetNamespace = uriReference
* version = string>
* Content: ((include | import | annotation)* , ((simpleType | complexType | element | group | attribute | attributeGroup | notation) , annotation*)+)
* </schema>
*
*
* <attribute
* form = qualified | unqualified
* id = ID
* name = NCName
* ref = QName
* type = QName
* use = default | fixed | optional | prohibited | required
* value = string>
* Content: (annotation? , simpleType?)
* </>
*
* <element
* abstract = boolean
* block = #all or (possibly empty) subset of {equivClass, extension, restriction}
* default = string
* equivClass = QName
* final = #all or (possibly empty) subset of {extension, restriction}
* fixed = string
* form = qualified | unqualified
* id = ID
* maxOccurs = string
* minOccurs = nonNegativeInteger
* name = NCName
* nullable = boolean
* ref = QName
* type = QName>
* Content: (annotation? , (simpleType | complexType)? , (unique | key | keyref)*)
* </>
*
*
* <complexType
* abstract = boolean
* base = QName
* block = #all or (possibly empty) subset of {extension, restriction}
* content = elementOnly | empty | mixed | textOnly
* derivedBy = extension | restriction
* final = #all or (possibly empty) subset of {extension, restriction}
* id = ID
* name = NCName>
* Content: (annotation? , (((minExclusive | minInclusive | maxExclusive | maxInclusive | precision | scale | length | minLength | maxLength | encoding | period | duration | enumeration | pattern)* | (element | group | all | choice | sequence | any)*) , ((attribute | attributeGroup)* , anyAttribute?)))
* </>
*
*
* <attributeGroup
* id = ID
* name = NCName
* ref = QName>
* Content: (annotation?, (attribute|attributeGroup), anyAttribute?)
* </>
*
* <anyAttribute
* id = ID
* namespace = ##any | ##other | ##local | list of {uri, ##targetNamespace}>
* Content: (annotation?)
* </anyAttribute>
*
* <group
* id = ID
* maxOccurs = string
* minOccurs = nonNegativeInteger
* name = NCName
* ref = QName>
* Content: (annotation? , (element | group | all | choice | sequence | any)*)
* </>
*
* <al