The view dimension is used a lot on OneStream XF applications. It is basically a dimension where you can view all the data.
YTD and Periodic are one of the most common view dimensions.
All view members can be queried through the Cube view.
Data Attachments include text and/or files. Data attachments are also queried on a Cube view. It is like that because then we are able to type comments directly into the Cube View cell. Comments are then imported to these members by using the TextValue Dimension. It will be stored outside of the Cube in a separate data attachment table.