The scopes architecture on Unity 7, which provides the Ubuntu shell and default UX experience on current desktops, and Unity 8, which powers the phone and soon the convergent desktop, differ to a large degree when it comes to visibility of data sources. Future Unity 8 builds will be obsoleting the legacy privacy flag in favour of a clearer way for users to decide where the data is being sent to.
By default, using a regular Dash search in Unity 7 will first contact Canonical’s smart scopes server, which recommends the best or most promising scopes for the search term. Then, as a second step, those scopes are queried for actual results, which will finally be presented.
However, this approach means that the user doesn’t necessarily know in advance which scopes are queried and that the search term will be hitting the smart scopes server. Although the data sent to server is anonymized, we understood that some users might still be concerned about data privacy. It was for that reason that privacy flag was introduced: a setting for scopes that prevents access to the smart scopes server.
The scopes architecture in Unity 8 is quite different: there is no smart scope server involved in the search lifecycle.
Instead, each query is only sent to the currently active scope (that is, the one that is currently visible), so that the user always knows where their search data ends up.
For the case where the current scope being is aggregating multiple other scopes, its settings page will list all aggregated scopes, offering the possibility to individually disable each one if desired.
With this clear visibility of what’s being queried, and the possibility to easily disable sources/scopes, the privacy flag becomes redundant in Unity 8. As such, we have decided to remove this legacy setting in one of our phone/Unity 8 next snapshots.
If you have been using this flag under Unity 8, either unfavorite or disable the respective scopes from the aggregator settings to reach the same result. You can also uninstall the individual scopes.
In the shell you can see two kind of scopes: normal scopes and aggregator scopes. Normal scopes can access either local or remote data but never both at the same time. So, if there is a scope called “My Music” then this scope will only query your phone, while a “BBC News” scope will only query bbc.co.uk. If you don’t want to use “BBC News” scope then do not invoke (via manage dash) or favor the scope (similar to not to invoke (web)apps).
Aggregator scopes in contrast can aggregate all kind of scopes whether they access local or remote data. If you’re concerned about a specific scope you can disable it via the scopes’ settings page that lists all scopes being aggregated. However, given that most scopes deal with remote data, it will be faster to just unfavorite the respective aggregator via “Manage Dash” and favorite the interesting scopes dealing with local data like “My Music” or “My Videos”. This has also the benefit of not having (almost) empty dash pages.
Pawel Stolowski works in the Unity API team on Scopes middleware & API that provide search functionality for Unity Shell. He also works on actual scopes (such as Music, Video, Apps…) as well as other projects used by Ubuntu Linux.
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