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Developing Business Logic 
Applications that want to integrate documents and other unstructured information in their business processes can use the client API. The API exposes basic and advanced functions for handling resources. It is primarily intended for applications that want to use the already implemented Knowledge Management functions to enhance their processes.
To use the client API for your application development:
● Get an introductory overview of the API
● Find out how to develop with basic aspects of resources
● Find out how to develop with advanced aspects of resources
● See tutorials that demonstrate how to use the client API