]> 2012-02-11T05:42:22-05:00 Advanced semantic concepts and services in the virtual solar-terrestrial observatory After almost three years experience in developing the Virtual Solar-Terrestrial Observatory (VSTO), we report on what we have learned about the level of knowledge representation required to satifying the science user needs. To date, we have achieved a unified query workflow based on an abstraction of classes (instrument, parameter, date-time) and provided semantic web services to make these available across the internet. We have also moved to the next level and generation of classes that capture science-level (higher) concepts such as state of the atmosphere, domains (e.g. neutral upper atmosphere), spatial locations, and parameterized representations of time (e.g. high geomagnetic activity). We also outline our plans for further representation, logic and reasoning within VSTO. VSTO is an NSF/OCI-funded joint effort between the High Altitude Observatory and the Computing and Information System Lab at the National Center for Atmospheric Research (NCAR) and McGuinness Associates Consulting. inproceedings American Geophysical Union, Fall Meeting (AGU2007) cinquini2007advanced Advanced Semantic Concepts and Services in the Virtual Solar-Terrestrial Observatory 2007 Year Title Natural science Tag Eos Trans. AGU 88(52), Fall Meet. Suppl., Abstract IN53B-1206 Note December Month Key Booktitle Bibtype James L. Benedict Don Middleton Jose M. Garcia Patrick West Deborah L. McGuinness Peter Fox Luca Cinquini Author San Francisco, Ca. Address Abstract Publication Proceeding Paper Conference Paper