# Components and Interfaces

## Components and interfaces

The **DDXF** framework can facilitate performing the following:

* Integrating **multi-system off-chain resources**
* **Tokenize data authority and privileges** and perform **cross-chain resource and token transactions**
* Implementing and realizing **resource** and **data exchange** in the form of **token passing** and changes in **data characteristics**
* **Data processing** and **transaction authentication** rights are supported for **offline resources** and any **off-chain** arbitration, ensuring **shared incentives**.

![DDXF Components](/files/-LvskNl295kh5R4niMqq)

There are three different function modules that the framework offers. Let us take a closer look at each one.

### Self-governed resource and data administration - DToken model

The self-sovereign data management is to decouple **data ownership** and **data accessibility** (or other data processing) **privileges**, thereby allowing for data management on a different level from the data owner(s).

**DDXF** provides a platform that allows for self-sovereign **data administration** using a combination of services such as:

* **Data storage** provides the ability to store data with security features and data privacy at a relatively lower cost.
* **ONT ID** helps identifying different parties such the data itself, the data owner, and the data handler.
* **DToken** allows for **data privilege management**, ensuring that the **data processing** and **storage** is carried out on the Ontology blockchain infrastructure.
* **Ontology blockchain** provides features such as **traceability** and **trust endorsement**.

The **DToken** model defines the following features:

* **Resource modeling and mapping -** Provides **static modeling** and **mapping** functions where the off-chain resources from Internet or `IoT` systems can be stored online in a form of a data model and the online data will be mapped onto with on-chain identifiers.
* **DToken generation -** provides a static identifier mapping capability, where data privileges can be **tokenized** in the form of `DTokens`. The usage of `DTokens` will be controlled from and logged on-chain.

The **DToken model** also provides interfaces to define **entities**, **resources** and **operations** in **DDXF**.

### Decentralized data processing and resource exchange

Decentralized data processing and administration module provides a run time mechanism to **control** the **business actions** of **resource exchange**, **data transfer**, and **data processing**.

The two main features of this module are:

* **Resource Exchange:** Provides the mechanism for token based resource transfer and exchange.
* **Token Usability:** Provides the mechanism to manage token usage, especially DToken usage to access data.

Decentralized data processing and administration module also provides **interfaces** to **process** and **manage data** in **DDXF**.

### Trust Audit

The **DDXF marketplace** provides the ability to carry out **cross system resource exchange**.

As a result of different business models, data can be owned by smart devices, end users, or systems. Data processing changes the form the data. **DDXF** enables **data processing**, **transfer**, and **exchange** with control over **ownership** and **accessibility** of **data instances**. The off-chain resources and the transactions carried out by the end users serves to provide **trust endorsement** for **DDXF**.

The two main features of this module are:

* **Resource audit:** Provides a mechanism to ensure the **ownership** and **accessibility** of off-chain resources, including the **resource quality** and **transaction behavior**.
* **Reputation score:** Based on the usage, transactions can provide trust endorsement for **DDXF**

**Trust audit module** also provides interfaces to implement the **trust endorsement** function for **transactions**, **data credentials**, and the **end users** in **DDXF**.


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