Export artifacts from Requirements Management (RM) in bulk PDF format

In the RRC 4.0.7 install I have, I see two options
1) In the artifact grid, I can select multiple artifacts, and with the artifact context menu select the option "generate a document-style report for # artifacts".
2) Also on top of the grid view, there is an icon that says "generate a document-style report for this view"

Both start a wizard where you can select the artifacts, the report type and various report options, where output types include PDF and Word.

You could write your own program to export artifacts through the OSLC API, but that means a programming effort, and understand the OSLC RM V2 API - the open standard way to programmatically integrate with RRC/DNG, there is an elaborate workshop to get you started here OSLC Workshop article.