# XmlDocument::getAttributeValue

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    #include <DbXml.hpp>

    XmlValue
    XmlDocument::getAttributeValue(const std::string &attr) const;

# Description

The XmlDocument::getAttributeValue method returns the value of the attr annotation attribute.

If the specified attribute is not in the document, the XmlDocument::getAttributeValue method will return DB_NOTFOUND. Otherwise, the XmlDocument::getAttributeValue method throws an exception that encapsulates a non-zero error value on failure.

# Errors

The XmlDocument::getAttributeValue method may fail and throw an exception encapsulating a non-zero error for the following conditions:

If the requested item could not be returned due to insufficient memory, the XmlDocument::getAttributeValue method will fail and throw a DbMemoryException exception.

The XmlDocument::getAttributeValue method may fail and throw an exception for errors specified for other Berkeley DB and C library or system methods. If a catastrophic error has occurred, the XmlDocument::getAttributeValue method may fail and throw a DbRunRecoveryException, in which case all subsequent Berkeley DB calls will fail in the same way.

# Class

XmlContainer, XmlDocument, XmlQueryContext

# See Also

XmlContainer::close, XmlContainer::declareIndex, XmlContainer::deleteDocument, XmlContainer::getDocument, XmlContainer::getName, XmlContainer::open, XmlContainer::putDocument and XmlContainer::queryWithXPath.

XmlDocument::getAttributeValue, XmlDocument::getContent, XmlDocument::getID, XmlDocument::getName, XmlDocument::getType, XmlDocument::setContent, XmlDocument::setName, and XmlDocument::setType.

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