there are a few good papers mentioning this :
1) Modelling Context Information with ORM⋆
by Karen Henricksen1, Jadwiga Indulska2, and Ted McFadden1
2) Tool Support for Designing CML Based Context Models in Pervasive Computing
by Johnson Fong1, 2, Jadwiga Indulska1, 2 and Ricky Robinson1, 2
** CML is an extension of ORM ...