# Functional

This section details the Trust Framework's functionality.

The [use cases depicted in earlier chapters](/use-cases.md) are only a selection of the iSHARE Trust Framework's full use case scope. This scope is based on [three 'primary' use cases](/detailed-descriptions/functional/primary-use-cases.md):

1. Machine-to-Machine service provision;
2. Human to Machine service provision with authorisation and identity info held at the Service Provider;
3. Human to Machine service provision with identity info held at the Identity Provider.

These primary use cases have several 'derived' use cases which cover all possible uses.

The primary use cases are supported by '[secondary' use cases](/detailed-descriptions/functional/secondary-use-cases.md), which include processes related to registration and processes that recur in primary use cases. This section is concluded by functional requirements - those [per role in the scheme](/detailed-descriptions/functional/functional-requirements-per-role.md) and those for the iSHARE [user interface](/detailed-descriptions/functional/functional-requirements-per-role/user-interface-requirements.md) in H2M use cases.


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