Add support for scope defined by a collection of topics #154
Description
In a topic map, scope is defined by a collection of topics that can be assigned to a name, an occurrence, or an association. The default scope (where no set is assigned) is known as the unconstrained scope and simply means that the name, occurrence, or association is always valid.
When a topic map-aware application encounters a name, occurrence, or association that has a scope assigned to it, the application should make use of information it has about the current operating context and compare that information against the scope information contained in the topic map to determine if the construct is valid and whether or not it should be presented to the user.
The standard will recommend that a scope that consists of multiple topics should be processed such that the scoped construct is valid only if the application determines that all of the topics in the scope apply to the current application context.