cancel checkInvariant close dump elementNameParse extensionsAdd extensionsCount extensionsLookupPrefix extensionsLookupUri extensionsPrefix extensionsUri fileName ImageFile isElementNameExtended isOpen isWritable operator!= operator== readerCount root writerCount

bool extensionsLookupUri ( const ustring &  uri, ustring &  prefix  ) const Get an E57 extension prefix associated with a URI in the ImageFile. Parameters: [in] uri The URI of the extension to look up. [out] prefix The shorthand prefix that was associated with the given uri. If uri is declared in the ImageFile, then prefix is set the corresponding prefix, and the function returns true. It is an error if uri contains an illegal character combination for E57 namespace URIs. It is not an error if uri is well-formed, but not defined in the ImageFile (the function just returns false). Precondition: This ImageFile must be open (i.e. isOpen()). uri != "" Postcondition: No visible state is modified. Returns: true if URI is declared in the ImageFile. Exceptions: E57_ERROR_BAD_API_ARGUMENT E57_ERROR_IMAGEFILE_NOT_OPEN E57_ERROR_INTERNAL All objects in undocumented state See also: Extensions.cpp example, ImageFile::extensionsLookupPrefix