[TYPO3-english] Translate viewhelper usage

[Sergio Catalá]

Hi list,

I saw in some extensions two usages of translate Viewhelper:

<f:translate key="hello">
     bye
</f:translate>

&

<f:translate key ="hello" />

But tag-content ("bye") is not used. What would it be the difference?

Thanks in advance.

Regards,
Sergio