Current state

Currently all data is provided transparently to particles. This means that any particle that is given data is 'tainted' by all the tags associated with that data.

Future work

Provide an opaque data type (e.g. a reference or key) which allows non-tainting data handling (i.e. pass through).
This should allow selection, mapping and the use of a service to de-reference (or re-associate) opaque data with it's associated data when needed, given access to the underlying data.