[10:49:40] <raboof>	 hi! I'm a user of an SMW wiki that has an 'activities' class and an iCalendar export. However, the iCalendar export does not export the start/end dates (anymore)
[10:51:07] <raboof>	 by good ol' printf debugging, I noticed the field type is not '_dat' but '_wpg'. does that indicate the type of the property of the class is not correct? how could I check that?
[11:00:45] <raboof>	 hmm it also reports _wpg when I misspell the column.. perhaps I'm not specifying it right?