* Gets the value of an XML attribute of the object.
*
* @param qualifiedName qualified name of the attribute
- * @return the attribute value, or NULL
+ * @return the attribute value, or nullptr
*/
virtual const XMLCh* getAttribute(const QName& qualifiedName) const=0;
* Sets (or clears) an XML attribute of the object.
*
* @param qualifiedName qualified name of the attribute
- * @param value value to set, or NULL to clear
+ * @param value value to set, or nullptr to clear
* @param ID true iff the attribute is an XML ID
*/
virtual void setAttribute(const QName& qualifiedName, const XMLCh* value, bool ID=false)=0;