{namespace c=HDNET\Calendarize\ViewHelpers}
{namespace m=HDNET\Microformat\ViewHelpers}
EXT:microformat
StructuredData Markup
https://support.google.com/webmasters/answer/3227638?hl=de
http://schema.org/Event
Test Utility
https://search.google.com/structured-data/testing-tool
Section: EventDescription
The EventDescription is the abstract or a part of the description.
To build a condition-block for the viewHelper-attribute, the outsourcing in sections comes handy.
{event.abstract}
{event.description}