TY - CONF TI - Scalable Annotation Mechanisms for Digital Content Aggregation and Context-Aware Authoring AF - 10th Brazilian Symposium on HumanFactors in Computer Systems & 5th Latin American Conference onHuman-Computer Interaction (IHC-CLIHC-2011) PP - Porto de Galinhas, Brazil SP - 376 EP - 380 PY - 2011-01-01 AU - Scharl, Arno AU - Hubmann-Haidvogel, Alexander AU - Wohlgenannt, Gerhard AU - Weichselbraun, Albert ER -