Query interface spec

[dosumis]

Simple queries

The query widget must be synced with the focus term.
The initial implementation should only allow single leg queries - the first leg should not be searchable.

Need to think about how easily discoverable queries are for users. Having menus on term info could work if formatted like this:

compound queries.

Compound queries should work by logically refining existing query result sets. At least one major way to do this will be to select new query legs whilst browsing. Further discussion is probably needed to decide on whether we allow other mechanisms and what they should be.

Queries that return list of the same gross type can be combined. e.g. any queries that return only neuron classes can be combined with other queries that return only neuron classes. We can drive this by encoding return type in the metadata with query results and in metadata associated with each query.

We need documentation of multi-leg queries as a decision tree.

Also add launch from or menus from term info?