year = 2012,
  title = "Defining a Metadata Schema for Serious Games as Learning Objects",
  booktitle = "The Fourth International Conference on Mobile Hybrid and On-line Learning (eL&mL 2012)",
  author = "M. Hendrix and A. Protopsaltis and C. Rolland and I. Dunwell and S. de Freitas and S. Arnab and P. Petridis and J. Llanas",
  publisher = "IARIA",
  keywords = "Game-based learning Metadata Repurposing Rating Web2.0 SGI",
  url = "files/metadata_sg_eLmL-camera_v2.pdf"