Do you want to create a native client or integrate with third party applications: webservices are the solution.
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I am new to OpenKM am unable to creat new document using openKM API's , If any body has the idea about or some sample eg then please reply .......thank you in advance....
You can take a look at some code in sourceforge MSOpenKMCore where there's the code we use in office pluggins there it's uploading / downloading exampels using WS