Create a schema from web service in eclipse

Hi all,

I'm trying to export some data out of SF to an 3rd party via a web service. In the webUI I have the possibility(Attachment 1) to create a schema from web service so my outgoing file matches the requirements. In Eclipse I cannot find that option and I'm encoutering some errors (attachement 2).

Can anyone tell me if there is a possibility like the web UI in eclipse?

Thanks in advance.