IGXMLScanner.cpp

            else
            {
                fValidator->emitError
                (
                    XMLValid::ElementNotValidForContent
                    , topElem->fChildren[res]->getRawName()
                    , topElem->fThisElement->getFormattedContentModel()
                );
            }
        }

        // reset xsi:type ComplexTypeInfo
        if (fGrammarType == Grammar::SchemaGrammarType) {
            ((SchemaElementDecl*)topElem->fThisElement)->setXsiComplexTypeInfo(0);
            if (!isRoot)
                ((SchemaElementDecl*)(fElemStack.topElement()->fThisElement))->setXsiComplexTypeInfo(
                     ((SchemaValidator*)fValidator)->getCurrentTypeInfo());

            // call matchers and de-activate context
            int oldCount = fMatcherStack->getMatcherCount();

            if (oldCount ||
                ((SchemaElementDecl*)topElem->fThisElement)->getIdentityConstraintCount()) {

                for (int i = oldCount - 1; i >= 0; i--) {

                    XPathMatcher* matcher = fMatcherStack->getMatcherAt(i);
                    matcher->endElement(*(topElem->fThisElement), fContent.getRawBuffer());
                }

                if (fMatcherStack->size() > 0) {
                    fMatcherStack->popContext();
                }

                // handle everything *but* keyref's.
                int newCount = fMatcherStack->getMatcherCount();

                for (int j = oldCount - 1; j >= newCount; j--) {

                    XPathMatcher* matcher = fMatcherStack->getMatcherAt(j);
                    IdentityConstraint* ic = matcher->getIdentityConstraint();

                    if (ic  && (ic->getType() != IdentityConstraint::KEYREF))
                        fValueStoreCache->transplant(ic, matcher->getInitialDepth());
                }

                // now handle keyref's...
                for (int k = oldCount - 1; k >= newCount; k--) {

                    XPathMatcher* matcher = fMatcherStack->getMatcherAt(k);
                    IdentityConstraint* ic = matcher->getIdentityConstraint();

                    if (ic && (ic->getType() == IdentityConstraint::KEYREF)) {

                        ValueStore* values = fValueStoreCache->getValueStoreFor(ic, matcher->getInitialDepth());

                        if (values) { // nothing to do if nothing matched!
                            values->endDcocumentFragment(fValueStoreCache);
                        }
                    }
                }

                fValueStoreCache->endElement();
            }
        }
    }

    // If we have a doc handler, tell it about the end tag
    if (fDocHandler)
    {
        fDocHandler->endElement
        (
            *topElem->fThisElement
            , uriId
            , isRoot
            , fPrefixBuf.getRawBuffer()
        );
    }

    // If this was the root, then done with content
    gotData = !isRoot;

    if (gotData) {
        if (fDoNamespaces) {
            // Restore the grammar
            fGrammar = fElemStack.getCurrentGrammar();
            fGrammarType = fGrammar->getGrammarType();
            if (fGrammarType == Grammar::SchemaGrammarType && !fValidator->handlesSchema()) {
                if (fValidatorFromUser)
                    ThrowXML(RuntimeException, XMLExcepts::Gen_NoSchemaValidator);
                else {
                    fValidator = fSchemaValidator;
                }
            }
            else if (fGrammarType == Grammar::DTDGrammarType && !fValidator->handlesDTD()) {
                if (fValidatorFromUser)
                    ThrowXML(RuntimeException, XMLExcepts::Gen_NoDTDValidator);
                else {
                    fValidator = fDTDValidator;
                }
            }

            fValidator->setGrammar(fGrammar);
        }

        // Restore the validation flag
        fValidate = fElemStack.getValidationFlag();
    }
}


//  This method handles the high level logic of scanning the DOCType
//  declaration. This calls the DTDScanner and kicks off both the scanning of
//  the internal subset and the scanning of the external subset, if any.
//
//  When we get here the '<!DOCTYPE' part has already been scanned, which is
//  what told us that we had a doc type decl to parse.
void IGXMLScanner::scanDocTypeDecl()
{
    //  We have a doc type. So, switch the Grammar.
    switchGrammar(XMLUni::fgDTDEntityString);

    if (fDocTypeHandler)
        fDocTypeHandler->resetDocType();

    // There must be some space after DOCTYPE
    if (!fReaderMgr.skipPastSpaces())
    {
        emitError(XMLErrs::ExpectedWhitespace);

        // Just skip the Doctype declaration and return
        fReaderMgr.skipPastChar(chCloseAngle);
        return;
    }

    // Get a buffer for the root element
    XMLBufBid bbRootName(&fBufMgr);

    //  Get a name from the input, which should be the name of the root
    //  element of the upcoming content.
    fReaderMgr.getName(bbRootName.getBuffer());
    if (bbRootName.isEmpty())
    {
        emitError(XMLErrs::NoRootElemInDOCTYPE);
        fReaderMgr.skipPastChar(chCloseAngle);
        return;
    }

    //  Store the root element name for later check
    setRootElemName(bbRootName.getRawBuffer());

    //  This element obviously is not going to exist in the element decl
    //  pool yet, but we need to call docTypeDecl. So force it into
    //  the element decl pool, marked as being there because it was in
    //  the DOCTYPE. Later, when its declared, the status will be updated.
    //
    //  Only do this if we are not reusing the validator! If we are reusing,
    //  then look it up instead. It has to exist!
    DTDElementDecl* rootDecl = new DTDElementDecl(bbRootName.getRawBuffer(), fEmptyNamespaceId);

    rootDecl->setCreateReason(DTDElementDecl::AsRootElem);
    rootDecl->setExternalElemDeclaration(true);
    ((DTDGrammar*)fGrammar)->setRootElemId(fGrammar->putElemDecl(rootDecl));

    // Skip any spaces after the name
    fReaderMgr.skipPastSpaces();

    //  And now if we are looking at a >, then we are done. It is not
    //  required to have an internal or external subset, though why you
    //  would not escapes me.
    if (fReaderMgr.skippedChar(chCloseAngle)) {

        //  If we have a doc type handler and advanced callbacks are enabled,
        //  call the doctype event.
        if (fDocTypeHandler)
            fDocTypeHandler->doctypeDecl(*rootDecl, 0, 0, false);
        return;
    }

    // either internal/external subset
    if (fValScheme == Val_Auto && !fValidate)
        fValidate = true;

    bool    hasIntSubset = false;
    bool    hasExtSubset = false;
    XMLCh*  sysId = 0;
    XMLCh*  pubId = 0;

    DTDScanner dtdScanner((DTDGrammar*)fGrammar, fDocTypeHandler);
    dtdScanner.setScannerInfo(this, &fReaderMgr, &fBufMgr);

    //  If the next character is '[' then we have no external subset cause
    //  there is no system id, just the opening character of the internal
    //  subset. Else, has to be an id.
    //
    // Just look at the next char, don't eat it.
    if (fReaderMgr.peekNextChar() == chOpenSquare)
    {
        hasIntSubset = true;
    }
    else
    {
        // Indicate we have an external subset
        hasExtSubset = true;
        fHasNoDTD = false;

        // Get buffers for the ids
        XMLBufBid bbPubId(&fBufMgr);
        XMLBufBid bbSysId(&fBufMgr);

        // Get the external subset id
        if (!dtdScanner.scanId(bbPubId.getBuffer(), bbSysId.getBuffer(), DTDScanner::IDType_External))
        {
            fReaderMgr.skipPastChar(chCloseAngle);
            return;
        }

        // Get copies of the ids we got
        pubId = XMLString::replicate(bbPubId.getRawBuffer());
        sysId = XMLString::replicate(bbSysId.getRawBuffer());

        // Skip spaces and check again for the opening of an internal subset
        fReaderMgr.skipPastSpaces();

        // Just look at the next char, don't eat it.
        if (fReaderMgr.peekNextChar() == chOpenSquare) {
            hasIntSubset = true;
        }
    }

    // Insure that the ids get cleaned up, if they got allocated
    ArrayJanitor<XMLCh> janSysId(sysId);
    ArrayJanitor<XMLCh> janPubId(pubId);

    //  If we have a doc type handler and advanced callbacks are enabled,
    //  call the doctype event.
    if (fDocTypeHandler)
        fDocTypeHandler->doctypeDecl(*rootDecl, pubId, sysId, hasIntSubset, hasExtSubset);

    //  Ok, if we had an internal subset, we are just past the [ character
    //  and need to parse that first.
    if (hasIntSubset)
    {
        // Eat the opening square bracket
        fReaderMgr.getNextChar();

        // We can't have any internal subset if we are reusing the validator
        if (fUseCachedGrammar || fToCacheGrammar)
            ThrowXML(RuntimeException, XMLExcepts::Val_CantHaveIntSS);

        //  And try to scan the internal subset. If we fail, try to recover
        //  by skipping forward tot he close angle and returning.
        if (!dtdScanner.scanInternalSubset())
        {
            fReaderMgr.skipPastChar(chCloseAngle);
            return;
        }

        //  Do a sanity check that some expanded PE did not propogate out of
        //  the doctype. This could happen if it was terminated early by bad
        //  syntax.
        if (fReaderMgr.getReaderDepth() > 1)
        {
            emitError(XMLErrs::PEPropogated);

            // Ask the reader manager to pop back down to the main level
            fReaderMgr.cleanStackBackTo(1);
        }

        fReaderMgr.skipPastSpaces();
    }

    // And that should leave us at the closing > of the DOCTYPE line
    if (!fReaderMgr.skippedChar(chCloseAngle))
    {
        //  Do a special check for the common scenario of an extra ] char at
        //  the end. This is easy to recover from.
        if (fReaderMgr.skippedChar(chCloseSquare)
        &&  fReaderMgr.skippedChar(chCloseAngle))
        {
            emitError(XMLErrs::ExtraCloseSquare);
        }
         else
        {
            emitError(XMLErrs::UnterminatedDOCTYPE);
            fReaderMgr.skipPastChar(chCloseAngle);
        }
    }

    //  If we had an external subset, then we need to deal with that one
    //  next. If we are reusing the validator, then don't scan it.
    if (hasExtSubset) {

        if (fUseCachedGrammar)
        {
            InputSource* sysIdSrc = resolveSystemId(sysId);
            Janitor<InputSource> janSysIdSrc(sysIdSrc);
            Grammar* grammar = fGrammarResolver->getGrammar(sysIdSrc->getSystemId());

            if (grammar && grammar->getGrammarType() == Grammar::DTDGrammarType) {

                fDTDGrammar = (DTDGrammar*) grammar;
                fGrammar = fDTDGrammar;
                fValidator->setGrammar(fGrammar);
                rootDecl = (DTDElementDecl*) fGrammar->getElemDecl(fEmptyNamespaceId, 0, bbRootName.getRawBuffer(), Grammar::TOP_LEVEL_SCOPE);

                if (rootDecl)
                    ((DTDGrammar*)fGrammar)->setRootElemId(rootDecl->getId());
                else {
                    rootDecl = new DTDElementDecl(bbRootName.getRawBuffer(), fEmptyNamespaceId);
                    rootDecl->setCreateReason(DTDElementDecl::AsRootElem);
                    rootDecl->setExternalElemDeclaration(true);
                    ((DTDGrammar*)fGrammar)->setRootElemId(fGrammar->putElemDecl(rootDecl));
                }

                return;
            }
        }

        if (fLoadExternalDTD || fValidate)
        {
            // And now create a reader to read this entity
            InputSource* srcUsed;
            XMLReader* reader = fReaderMgr.createReader
            (
                sysId
                , pubId
                , false
                , XMLReader::RefFrom_NonLiteral
                , XMLReader::Type_General
                , XMLReader::Source_External
                , srcUsed
                , fCalculateSrcOfs
            );

            // Put a janitor on the input source
            Janitor<InputSource> janSrc(srcUsed);

            //  If it failed then throw an exception
            if (!reader)
                ThrowXML1(RuntimeException, XMLExcepts::Gen_CouldNotOpenDTD, srcUsed->getSystemId());

            if (fToCacheGrammar) {

                unsigned int stringId = fGrammarResolver->getStringPool()->addOrFind(srcUsed->getSystemId());
                const XMLCh* sysIdStr = fGrammarResolver->getStringPool()->getValueForId(stringId);

                fGrammarResolver->orphanGrammar(XMLUni::fgDTDEntityString);
                fGrammarResolver->putGrammar(sysIdStr, fGrammar);
            }

            //  In order to make the processing work consistently, we have to
            //  make this look like an external entity. So create an entity
            //  decl and fill it in and push it with the reader, as happens
            //  with an external entity. Put a janitor on it to insure it gets
            //  cleaned up. The reader manager does not adopt them.
            const XMLCh gDTDStr[] = { chLatin_D, chLatin_T, chLatin_D , chNull };
            DTDEntityDecl* declDTD = new DTDEntityDecl(gDTDStr);
            declDTD->setSystemId(sysId);
            Janitor<DTDEntityDecl> janDecl(declDTD);

            // Mark this one as a throw at end
            reader->setThrowAtEnd(true);

            // And push it onto the stack, with its pseudo name
            fReaderMgr.pushReader(reader, declDTD);

            // Tell it its not in an include section
            dtdScanner.scanExtSubsetDecl(false);
        }
    }
}

bool IGXMLScanner::scanStartTag(bool& gotData)
{
    //  Assume we will still have data until proven otherwise. It will only
    //  ever be false if this is the root and its empty.
    gotData = true;

    //  Get the QName. In this case, we are not doing namespaces, so we just
    //  use it as is and don't have to break it into parts.
    if (!fReaderMgr.getName(fQNameBuf))
    {
        emitError(XMLErrs::ExpectedElementName);
        fReaderMgr.skipToChar(chOpenAngle);
        return false;
    }

    // Assume it won't be an empty tag
    bool isEmpty = false;

    //  Lets try to look up the element in the validator's element decl pool
    //  We can pass bogus values for the URI id and the base name. We know that
    //  this can only be called if we are doing a DTD style validator and that
    //  he will only look at the QName.
    //
    //  We tell him to fault in a decl if he does not find one.
    bool wasAdded = false;
    XMLElementDecl* elemDecl = fGrammar->findOrAddElemDecl
    (
        fEmptyNamespaceId
        , 0
        , 0
        , fQNameBuf.getRawBuffer()
        , Grammar::TOP_LEVEL_SCOPE
        , wasAdded
    );

    //  We do something different here according to whether we found the
    //  element or not.
    if (wasAdded)
    {
        // If validating then emit an error
        if (fValidate)
        {
            // This is to tell the reuse Validator that this element was
            // faulted-in, was not an element in the validator pool originally
            elemDecl->setCreateReason(XMLElementDecl::JustFaultIn);

            fValidator->emitError
            (
                XMLValid::ElementNotDefined
                , elemDecl->getFullName()
            );
        }
    }
    else
    {
        // If its not marked declared and validating, then emit an error
        if (fValidate && !elemDecl->isDeclared())
        {
            fValidator->emitError
            (
                XMLValid::ElementNotDefined
                , elemDecl->getFullName()
            );
        }
    }

    // See if its the root element
    const bool isRoot = fElemStack.isEmpty();

    // Expand the element stack and add the new element
    fElemStack.addLevel(elemDecl, fReaderMgr.getCurrentReaderNum());
    fElemStack.setValidationFlag(fValidate);

    //  Validate the element
    if (fValidate)
        fValidator->validateElement(elemDecl);

    //  If this is the first element and we are validating, check the root
    //  element.
    if (isRoot)
    {
        fRootGrammar = fGrammar;

        if (fValidate)
        {
            //  If a DocType exists, then check if it matches the root name there.
            if (fRootElemName && !XMLString::equals(fQNameBuf.getRawBuffer(), fRootElemName))
                fValidator->emitError(XMLValid::RootElemNotLikeDocType);

            //  Some validators may also want to check the root, call the
            //  XMLValidator::checkRootElement
            if (fValidatorFromUser && !fValidator->checkRootElement(elemDecl->getId()))
                fValidator->emitError(XMLValid::RootElemNotLikeDocType);
        }
    }
    else
    {
        //  If the element stack is not empty, then add this element as a
        //  child of the previous top element. If its empty, this is the root
        //  elem and is not the child of anything.
        fElemStack.addChild(elemDecl->getElementName(), true);
    }

    //  Ask the element decl to clear out the 'provided' flag on all of its
    //  att defs.
    elemDecl->resetDefs();

    // Skip any whitespace after the name
    fReaderMgr.skipPastSpaces();

    //  We loop until we either see a /> or >, handling attribute/value
    //  pairs until we get there.
    unsigned int    attCount = 0;
    unsigned int    curAttListSize = fAttrList->size();
    while (true)
    {
        // And get the next non-space character
        XMLCh nextCh = fReaderMgr.peekNextChar();

        //  If the next character is not a slash or closed angle bracket,
        //  then it must be whitespace, since whitespace is required
        //  between the end of the last attribute and the name of the next
        //  one.
        if (attCount)
        {
            if ((nextCh != chForwardSlash) && (nextCh != chCloseAngle))
            {
                if (fReaderMgr.getCurrentReader()->isWhitespace(nextCh))
                {
                    // Ok, skip by them and peek another char
                    fReaderMgr.skipPastSpaces();
                    nextCh = fReaderMgr.peekNextChar();
                }
                 else
                {
                    // Emit the error but keep on going
                    emitError(XMLErrs::ExpectedWhitespace);
                }
            }
        }

        //  Ok, here we first check for any of the special case characters.
        //  If its not one, then we do the normal case processing, which
        //  assumes that we've hit an attribute value, Otherwise, we do all
        //  the special case checks.
        if (!fReaderMgr.getCurrentReader()->isSpecialStartTagChar(nextCh))
        {
            //  Assume its going to be an attribute, so get a name from
            //  the input.
            if (!fReaderMgr.getName(fAttNameBuf))
            {
                emitError(XMLErrs::ExpectedAttrName);
                fReaderMgr.skipPastChar(chCloseAngle);
                return false;
            }

            // And next must be an equal sign
            if (!scanEq())
            {
                static const XMLCh tmpList[] =
                {
                    chSingleQuote, chDoubleQuote, chCloseAngle
                    , chOpenAngle, chForwardSlash, chNull
                };

                emitError(XMLErrs::ExpectedEqSign);

                //  Try to sync back up by skipping forward until we either
                //  hit something meaningful.
                const XMLCh chFound = fReaderMgr.skipUntilInOrWS(tmpList);

                if ((chFound == chCloseAngle) || (chFound == chForwardSlash))
                {
                    // Jump back to top for normal processing of these
                    continue;
                }
                else if ((chFound == chSingleQuote)
                      ||  (chFound == chDoubleQuote)
                      ||  fReaderMgr.getCurrentReader()->isWhitespace(chFound))
                {
                    // Just fall through assuming that the value is to follow
                }
                else if (chFound == chOpenAngle)
                {
                    // Assume a malformed tag and that new one is starting
                    emitError(XMLErrs::UnterminatedStartTag, elemDecl->getFullName());
                    return false;
                }
                else
                {
                    // Something went really wrong
                    return false;
                }
            }

            //  See if this attribute is declared for this element. If we are
            //  not validating of course it will not be at first, but we will
            //  fault it into the pool (to avoid lots of redundant errors.)
            wasAdded = false;
            XMLAttDef* attDef = elemDecl->findAttr
            (
                fAttNameBuf.getRawBuffer()
                , 0
                , 0
                , 0
                , XMLElementDecl::AddIfNotFound
                , wasAdded
            );

            if (wasAdded)
            {
                //  If there is a validation handler, then we are validating
                //  so emit an error.
                if (fValidate)
                {
                    // This is to tell the Validator that this attribute was
                    // faulted-in, was not an attribute in the attdef originally
                    attDef->setCreateReason(XMLAttDef::JustFaultIn);

                    fValidator->emitError
                    (
                        XMLValid::AttNotDefinedForElement
                        , fAttNameBuf.getRawBuffer()
                        , elemDecl->getFullName()
                    );
                }
            }
            else
            {
                // If this attribute was faulted-in and first occurence,
                // then emit an error
                if (fValidate && attDef->getCreateReason() == XMLAttDef::JustFaultIn
                    && !attDef->getProvided())
                {
                    fValidator->emitError
                    (
                        XMLValid::AttNotDefinedForElement
                        , fAttNameBuf.getRawBuffer()
                        , elemDecl->getFullName()
                    );
                }
            }

            //  If its already provided, then there are more than one of
            //  this attribute in this start tag, so emit an error.
            if (attDef->getProvided())
            {
                emitError
                (
                    XMLErrs::AttrAlreadyUsedInSTag
                    , attDef->getFullName()
                    , elemDecl->getFullName()
                );
            }
            else
            {
                // Mark this one as already seen
                attDef->setProvided(true);
            }

            //  Skip any whitespace before the value and then scan the att
            //  value. This will come back normalized with entity refs and
            //  char refs expanded.
            fReaderMgr.skipPastSpaces();
            if (!scanAttValue(attDef, fAttValueBuf))
            {
                static const XMLCh tmpList[] =
                {
                    chCloseAngle, chOpenAngle, chForwardSlash, chNull
                };

                emitError(XMLErrs::ExpectedAttrValue);

                //  It failed, so lets try to get synced back up. We skip
                //  forward until we find some whitespace or one of the
                //  chars in our list.
                const XMLCh chFound = fReaderMgr.skipUntilInOrWS(tmpList);

                if ((chFound == chCloseAngle)
                ||  (chFound == chForwardSlash)
                ||  fReaderMgr.getCurrentReader()->isWhitespace(chFound))
                {
                    //  Just fall through and process this attribute, though
                    //  the value will be "".
                }
                else if (chFound == chOpenAngle)
                {
                    // Assume a malformed tag and that new one is starting
                    emitError(XMLErrs::UnterminatedStartTag, elemDecl->getFullName());
                    return false;
                }
                else
                {
                    // Something went really wrong
                    return false;
                }
            }

            //  Now that its all stretched out, lets look at its type and
            //  determine if it has a valid value. It will output any needed
            //  errors, but we just keep going. We only need to do this if
            //  we are validating.
            if (!wasAdded && attDef->getCreateReason() != XMLAttDef::JustFaultIn)
            {
                // Let the validator pass judgement on the attribute value
                if (fValidate)
                {
                    fValidator->validateAttrValue
                    (
                        attDef
                        , fAttValueBuf.getRawBuffer()
                        , false
                        , elemDecl
                    );
                }
            }

            //  Add this attribute to the attribute list that we use to
            //  pass them to the handler. We reuse its existing elements
            //  but expand it as required.
            XMLAttr* curAtt;
            if (attCount >= curAttListSize)
            {
                curAtt = new XMLAttr
                (
                    -1
                    , fAttNameBuf.getRawBuffer()
                    , XMLUni::fgZeroLenString
                    , fAttValueBuf.getRawBuffer()
                    , attDef->getType()
                    , true
                );
                fAttrList->addElement(curAtt);
            }
            else
            {
                curAtt = fAttrList->elementAt(attCount);
                curAtt->set
                (
                    -1
                    , fAttNameBuf.getRawBuffer()
                    , XMLUni::fgZeroLenString
                    , fAttValueBuf.getRawBuffer()
                    , attDef->getType()
                );
                curAtt->setSpecified(true);
            }
            attCount++;

            // And jump back to the top of the loop
            continue;
        }

        //  It was some special case character so do all of the checks and
        //  deal with it.
        if (!nextCh)
            ThrowXML(UnexpectedEOFException, XMLExcepts::Gen_UnexpectedEOF);

        if (nextCh == chForwardSlash)
        {
            fReaderMgr.getNextChar();
            isEmpty = true;
            if (!fReaderMgr.skippedChar(chCloseAngle))
                emitError(XMLErrs::UnterminatedStartTag, elemDecl->getFullName());
            break;
        }
        else if (nextCh == chCloseAngle)
        {
            fReaderMgr.getNextChar();
            break;
        }
        else if (nextCh == chOpenAngle)
        {
            //  Check for this one specially, since its going to be common
            //  and it is kind of auto-recovering since we've already hit the
            //  next open bracket, which is what we would have seeked to (and
            //  skipped this whole tag.)
            emitError(XMLErrs::UnterminatedStartTag, elemDecl->getFullName());
            break;
        }
        else if ((nextCh == chSingleQuote) || (nextCh == chDoubleQuote))
        {
            //  Check for this one specially, which is probably a missing
            //  attribute name, e.g. ="value". Just issue expected name
            //  error and eat the quoted string, then jump back to the
            //  top again.
            emitError(XMLErrs::ExpectedAttrName);
            fReaderMgr.getNextChar();
            fReaderMgr.skipQuotedString(nextCh);
            fReaderMgr.skipPastSpaces();
            continue;
        }
    }

    //  Ok, so lets get an enumerator for the attributes of this element
    //  and run through them for well formedness and validity checks. But
    //  make sure that we had any attributes before we do it, since the list
    //  would have have gotten faulted in anyway.
    if (elemDecl->hasAttDefs())
    {
        XMLAttDefList& attDefList = elemDecl->getAttDefList();
        while (attDefList.hasMoreElements())
        {
            // Get the current att def, for convenience and its def type
            const XMLAttDef& curDef = attDefList.nextElement();
            const XMLAttDef::DefAttTypes defType = curDef.getDefaultType();

            if (!curDef.getProvided())
            {
                if (fValidate)
                {
                    // If we are validating and its required, then an error
                    if (defType == XMLAttDef::Required)
                    {
                        fValidator->emitError
                        (
                            XMLValid::RequiredAttrNotProvided
                            , curDef.getFullName()
                        );
                    }
                    else if ((defType == XMLAttDef::Default) ||
		                       (defType == XMLAttDef::Fixed)  )
                    {
                        if (fStandalone && curDef.isExternal())
                        {
                            // XML 1.0 Section 2.9
                            // Document is standalone, so attributes must not be defaulted.
                            fValidator->emitError(XMLValid::NoDefAttForStandalone, curDef.getFullName(), elemDecl->getFullName());
                        }
                    }
                }

                // Fault in the value if needed, and bump the att count
                if ((defType == XMLAttDef::Default)
                ||  (defType == XMLAttDef::Fixed))
                {
                    // Let the validator pass judgement on the attribute value
                    if (fValidate)
                    {
                        fValidator->validateAttrValue
                        (
                            &curDef
                            , curDef.getValue()
                            , false
                            , elemDecl
                        );
                    }

                    XMLAttr* curAtt;
                    if (attCount >= curAttListSize)
                    {
                        curAtt = new XMLAttr
                        (
                            -1
                            , curDef.getFullName()
                            , XMLUni::fgZeroLenString
                            , curDef.getValue()
                            , curDef.getType()
                            , false
                        );
                        fAttrList->addElement(curAtt);
                        curAttListSize++;
                    }
                    else
                    {
                        curAtt = fAttrList->elementAt(attCount);
                        curAtt->set
                        (
                            -1
                            , curDef.getFullName()
                            , XMLUni::fgZeroLenString
                            , curDef.getValue()
                            , curDef.getType()
                        );
                        curAtt->setSpecified(false);
                    }
                    attCount++;
                }
            }
        }
    }

    //  If empty, validate content right now if we are validating and then
    //  pop the element stack top. Else, we have to update the current stack
    //  top's namespace mapping elements.
    if (isEmpty)
    {
        // If validating, then insure that its legal to have no content
        if (fValidate)
        {
            const int res = fValidator->checkContent(elemDecl, 0, 0);
            if (res >= 0)
            {
                fValidator->emitError
                (
                    XMLValid::ElementNotValidForContent
                    , elemDecl->getFullName()
                    , elemDecl->getFormattedContentModel()
                );
            }
        }

        // Pop the element stack back off since it'll never be used now
        fElemStack.popTop();

        // If the elem stack is empty, then it was an empty root
        if (isRoot)
            gotData = false;
        else {
            // Restore the validation flag
            fValidate = fElemStack.getValidationFlag();
        }
    }

    //  If we have a document handler, then tell it about this start tag. We
    //  don't have any URI id to send along, so send fEmptyNamespaceId. We also do not send
    //  any prefix since its just one big name if we are not doing namespaces.
    if (fDocHandler)
    {
        fDocHandler->startElement
        (
            *elemDecl
            , fEmptyNamespaceId
            , 0
            , *fAttrList
            , attCount
            , isEmpty
            , isRoot
        );
    }

    return true;
}


//  This method is called to scan a start tag when we are processing
//  namespaces. There are two different versions of this method, one for
//  namespace aware processing an done for non-namespace aware processing.
//
//  This method is called after we've scanned the < of a start tag. So we
//  have to get the element name, then scan the attributes, after which
//  we are either going to see >, />, or attributes followed by one of those
//  sequences.
bool IGXMLScanner::scanStartTagNS(bool& gotData)
{
    //  Assume we will still have data until proven otherwise. It will only
    //  ever be false if this is the root and its empty.
    gotData = true;

    // Reset element content buffer
    fContent.reset();

    //  The current position is after the open bracket, so we need to read in
    //  in the element name.
    if (!fReaderMgr.getName(fQNameBuf))
    {
        emitError(XMLErrs::ExpectedElementName);
        fReaderMgr.skipToChar(chOpenAngle);
        return false;
    }

    // See if its the root element
    const bool isRoot = fElemStack.isEmpty();

    // Skip any whitespace after the name
    fReaderMgr.skipPastSpaces();

    //  First we have to do the rawest attribute scan. We don't do any
    //  normalization of them at all, since we don't know yet what type they
    //  might be (since we need the element decl in order to do that.)
    bool isEmpty;
    unsigned int attCount = rawAttrScan
    (
        fQNameBuf.getRawBuffer()
        , *fRawAttrList
        , isEmpty
    );
    const bool gotAttrs = (attCount != 0);

    // save the contentleafname and currentscope before addlevel, for later use
    ContentLeafNameTypeVector* cv = 0;
    XMLContentModel* cm = 0;
    int currentScope = Grammar::TOP_LEVEL_SCOPE;
    bool laxThisOne = false;

    if (!isRoot && fGrammarType == Grammar::SchemaGrammarType) {
        SchemaElementDecl* tempElement = (SchemaElementDecl*) fElemStack.topElement()->fThisElement;
        SchemaElementDecl::ModelTypes modelType = tempElement->getModelType();

        if ((modelType == SchemaElementDecl::Mixed_Simple)
          ||  (modelType == SchemaElementDecl::Mixed_Complex)
          ||  (modelType == SchemaElementDecl::Children))
        {
            cm = tempElement->getContentModel();
            cv = cm->getContentLeafNameTypeVector();
            currentScope = fElemStack.getCurrentScope();
        }
        else if (modelType == SchemaElementDecl::Any) {
            laxThisOne = true;
        }
    }

    //  Now, since we might have to update the namespace map for this element,
    //  but we don't have the element decl yet, we just tell the element stack
    //  to expand up to get ready.
    unsigned int elemDepth = fElemStack.addLevel();
    fElemStack.setValidationFlag(fValidate);

    //  Check if there is any external schema location specified, and if we are at root,
    //  go through them first before scanning those specified in the instance document
    if (isRoot
        && fDoSchema
        && (fExternalSchemaLocation || fExternalNoNamespaceSchemaLocation)) {

        if (fExternalSchemaLocation)
            parseSchemaLocation(fExternalSchemaLocation);
        if (fExternalNoNamespaceSchemaLocation)
            resolveSchemaGrammar(fExternalNoNamespaceSchemaLocation, XMLUni::fgZeroLenString);
    }

    //  Make an initial pass through the list and find any xmlns attributes or
    //  schema attributes.
    if (attCount)
      scanRawAttrListforNameSpaces(fRawAttrList, attCount);

    //  Also find any default or fixed xmlns attributes in DTD defined for
    //  this element.