# Component Architecture

\ <mark style="color:orange;">**\<THIS SECTION IS UNDER CONSTRUCTION>**</mark>

## Overview <a href="#overview" id="overview"></a>

### Components

#### Reliable Data Storage Layer

This component provides storage and retrieval of persistent data that is:

* resilient in the presence of failures of computing nodes and network infrastructures.
* evolvable
* validating
* eventually consistent
* self-describing -- the structure of the data managed relies on descriptions managed by the Type Descriptions component.
*

#### Type Descriptions

This component manages the type descriptions of the data that is:

* stored by the Data Storage Layer
* used to express access control policies managed by the Data Access layer
* referenced in offers and agreements managed by the Agreements component
* presented by the Human Interface Services component.
* used by the weSpaces component to validate service requests against service agreements

#### Agreements

This component provides access to Service Agreements.

#### Data Access Layer

This component mediates access to the data storage services, enforcing access policies

#### Service Access Points

This components exposes interface points for services, enforcing security policies aligned with the requested service's agreement.

#### iSpace

This component maintains:

* the active agents that belong to an iSpace and their assigned capabilities,&#x20;
* the weSpaces this iSpace agent participates in. This includes the persona(s) the iSpace agent exposes to each weSpace

#### weSpace

This component maintains:

* the apps assigned to that weSpace
* the active agents that belong to the weSpace and permissions each agent has with respect to each app assigned to that weSpace
* authorizes inbound and outbound services requests
* manages inter-agent communication across membraned boundaries.

#### Service Logic

This is the custom logic for a given service. Each service has its own Service Logic component.

#### Human Interface Services

This component provides visualization and interaction to human users of information and actions offered by the set of services available to that person's iSpace.

### Component Interactions

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