Added description of the component

README.md

 # Public Service Provider Module
 
 ## 1. Technical Component
-![Alt text](figures/component_c4ai.png?raw=true "Title")
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+This technical component is a representative implementation of a service provider in the german public sector. It could be pre-configured and deployed for different providers with different services. The following figure gives an overview about the environemnt of such a component:
+
+<p align="center">
+  <img src="figures/component_c4ai.png">
+</p>
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+Through a RESTful API as interface, a public service provider module can be easily integrated in (Web-)Applications and portals. It has been designed according to the OpenAPI specification standards and is thus resrouces based. Every instance of PSP-module contains exactly three resrouces:
+- /Leistung: to get information about the available services.
+- /Verfahren: to apply for a service and get its processing status.
+- /Sachverhalte: to retrieve and verify service-realted documents.
 
 ## 2. Possible Use Case