Date of download: 7/6/2016 Copyright © ASME. All rights reserved. From: Hierarchical Role-Based Viewing for Multilevel Information Security in Collaborative CAD J. Comput. Inf. Sci. Eng. 2005;6(1):2-10. doi: / An example weighted role hierarchy with associated labels Figure Legend:

Date of download: 7/6/2016 Copyright © ASME. All rights reserved. From: Hierarchical Role-Based Viewing for Multilevel Information Security in Collaborative CAD J. Comput. Inf. Sci. Eng. 2005;6(1):2-10. doi: / An example part with one security feature where b(M) is assigned to r0 Figure Legend:

Date of download: 7/6/2016 Copyright © ASME. All rights reserved. From: Hierarchical Role-Based Viewing for Multilevel Information Security in Collaborative CAD J. Comput. Inf. Sci. Eng. 2005;6(1):2-10. doi: / An example part with one security feature (f0) consisting of b(M) assigned to r0, a set of actors assigned to roles, and their corresponding set of secure models Figure Legend:

Date of download: 7/6/2016 Copyright © ASME. All rights reserved. From: Hierarchical Role-Based Viewing for Multilevel Information Security in Collaborative CAD J. Comput. Inf. Sci. Eng. 2005;6(1):2-10. doi: / The direct permission mappings derived from the AR, RH, and MR relations given in Figs., respectively Figure Legend: