Every now and then here at the Guru Headquarters we run into something that takes some research to figure out what PTC was doing, well here is one of them. In the assembly model tree there is a little symbol that shows if a component (or feature) is fully defined or suppressed, frozen, packaged.. ETC. well I found the name and a chart of what they are. Not sure why the name "Glyph" but the attached image shows what they are.