From the
documentation[
^]
Creating a Group Discussion Post
Sharing content with a post is fairly straight forward. Simply make a POST call to the Groups API:
POST
http://api.linkedin.com/v1/groups/{group-id}/posts
Passing in the group discussion input
<post>
<title>New Group Discussion</title>
<summary>What does everyone think about platform development?</summary>
<content>
<submitted-url>http://developer.linkedin.com/forum</submitted-url>
<submitted-image-url>http:/www.example.com/linkedin.png</submitted-image-url>
<title>Build the Professional Web with LinkedIn</title>
<description>A great resource for finding documentation and answers related to developing on the LinkedIn Platform</description>
</content>
</post>