SPATA2 aims to facilitate vertical integration of multiple data modalities. Therefore, the SPATA2 object allows to store multiple aspects of data at the same time. To know what to extract by default, the concept active and inactive has been integrated.

For instance, multiple images can be registered. Which image to use can always be specified using the argument img_name. By default, the functions will pick the image that was denoted as the active image by the function activateImage(). Which image is currently active can be checked with activeImage().

This concept applies to every other aspect, like assays and data matrices. It only becomes relevant if the SPATA2 object contains more than one aspect.