Following PR #185, DataFrames and OrderedLists will be visualised in any o2rDisplayFiles directive as JSON Strings.
For both types, there may be more suitable options for visualisation, e.g. Tabular Views (especially for DataFrames).
Such a view would need to be created dynamically, as there is no way of predicting the content (i.e. attribute names) of any and all DataFrames or OrderedLists.
It is, however, easy to differentiate between the two types, and the o2r-platform after #185 already does (although without making use or mention of this). DataFrames are the only possible type of Array of Objects, and OrderedLists are the only Attributes represented in JSON as an Object.