Accessing project documentation managed in Vignette Collaboration and VRD from external asset manage

Good morning. Our client is currently running Vignette Collaboration (v8.0.2) as well as Vignette VRD to manage a variety of project documentation. My firm has been tasked with determining if/how to leverage the documents maintained in these systems by establishing connections/links to an external asset management platform. We have several outstanding questions:
1) Are these products built on an open architecture platform? If so, which platform?
2) Do these products have the ability to connect to web services and publish documents (REST, RSS, XML,JSON)?
3) Do these products support dynamic hyperlinking capability?
4) Is an SDK available from OpenText to support development against these products?
Thanks.