Attribute with default value not immediately replaced... ?

[Nicolas Tsokas]

Hi everybody...   In Xerces 2.7.0 it is explicitly stated that, no matter how one removes an attribute (attList->removeNamedItem, attList->removeNamedItemNS, domElement->removeAttributeNode, domElement->removeAttribute, domElement->removeAttributeNS), if that attribute has a default value it is immediately replaced. However I cannot obtain that behaviour...   Check out the following schema and document:   SCHEMA <?xml version="1.0" encoding="UTF-8"?> <xsd:schema  xmlns:xsd="http://www.w3.org/2001/XMLSchema"                         xmlns="http://schema1"                         targetNamespace="http://schema1"                         elementFormDefault="qualified"                         attributeFormDefault="unqualified">         <xsd:element name="subelement" type="subelementType"/>         <xsd:element name="rootelement">                 <xsd:complexType>                         <xsd:choice maxOccurs="unbounded">                                 <xsd:element ref="subelement"/>                         </xsd:choice>                 </xsd:complexType>         </xsd:element>         <xsd:attribute name="myat" type="xsd:string" default="123"/>         <xsd:complexType name="subelementType">                 <xsd:attribute ref="myat"/>         </xsd:complexType> </xsd:schema>   DOCUMENT <?xml version="1.0" encoding="UTF-8"?> <rootelement    xmlns="http://schema1"                         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"                         xsi:schemaLocation="http://schema1 schema.xsd">         <subelement/> </rootelement>   I load the document to a DOM like this:   DOMParser->setDoNamespaces(true); DOMParser->setDoSchema(true); DOMParser->setValidationSchemaFullChecking(true); DOMParser->parse(FileName); In the DOM constructed, as expected, there is a "myat" attribute for element "subelement" having the value of "123". As the latter was declared as a global attribute in the schema, it is namespace-qualified (getNamespaceURI() GIVES "http://schema1") even though schema has attributeFormDefault="unqualified" (correct me if I'm wrong...). So far so good. Now I'm trying to remove that attribute. No matter which of the above methods I choose, I cannot obtain the immediate replacement of this attribute, although it has a default value. “removeNamedItem” causes the creation of a "myat" element, but with no namespace. All other methods just remove the attribute and no replacement occurs.   What is going on? Am I missing something?...   Is default-attribute re-instantiation only working for defaults specified in DTDs?, not in schemas?   Any help would be GREATLY appreciated... Thanks in advance.   Nicolas