[TYPO3-english] tx_news: How to set title tag in format.fileDownload viewhelper

[Dirk Wenzel]

Hi,
Using the format.fileDownload viewhelper I would like to set the title 
tag of the generated link to the content of the description field (file).

In TypoScript setting

plugin.tx_news.settings.relatedFiles.download.title = some text

works. But how would I read out the description field of the current 
file here?

Kind regards
Dirk