get_drr_title returns a text string with the associated Data Release Report (DRR)'s Title.
get_drr_title(eml_object)
a text string
get_drr_title accesses useageCitation under dataset and returns the title element, if it is found. If it is not found, the user is warned and pointed ot the set_drr function to add the title of the associated DRR.
if (FALSE) { # \dontrun{
get_drr_title(eml_object)
} # }