The Smithsonian/NASA Astrophysics Data System exists at the nexus of a dense system of interacting and interlinked information networks. The syntactic and the semantic content of this multipartite graph structure can be combined to provide very specific research recommendations to the scientist/user.
@article{arxiv.0912.5235,
title = {Using Multipartite Graphs for Recommendation and Discovery},
author = {Michael J. Kurtz and Alberto Accomazzi and Edwin Henneken and Giovanni Di Milia and Carolyn S. Grant},
journal= {arXiv preprint arXiv:0912.5235},
year = {2009}
}