[architecture.graphml](architecture.graphml) has been created and therefore can be opened/viewed/edited with [yEd Graph Editor](https://www.yworks.com/products/yed).
*[architecture.graphml](architecture.graphml): network diagram (created with [yEd Graph Editor](https://www.yworks.com/products/yed))
Alternatively you can take a look at [architecture.pdf](architecture.pdf).
*[architecture.md](architecture.md): information on network diagram
*[architecture.pdf](architecture.pdf): PDF export of network diagram
network diagram of the basic structure of the OEA platform
## discover
Clients (mobile, laptop, desktop) can request the **search** application via a **webserver**.
The **search** application is crafted to allow calls from the client to the **api gateway** via the **webserver**.
The **api gateway** provides an abstraction layer to the individual API of the engine used within the **index** application,
and is also responsible for tasks as authentication and authorization.
Servers might utilize direct requests to the **index** application via **webserver** and **api gateway**.
**webserver**, **search**, **api gateway** and **index** are represented as blocks representing container technology for easy engineering, deployment and scalability.
Technology suggested to be used is noted inside and at the upper right corners of the container blocks.
The **metaharvest** application is configured to fetch metadata and information on LTI connectors from repositories.
These repositories provide digital objects whose metadata and LTI connectivity is provided thru the **index** application.
The **metaindex** application operates as a message queue for the **metaingest** application which in turn feeds the **index** application.
## feed
The **feed** part of the OEA platform is considered separate from the **discover** part.
Clients (mobile, laptop, desktop) can request the **ingest** application via a **webserver**.
The **ingest** application is crafted to allow upload of digital objects supplied with metadata to a specific repository.
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