[Boost-users] How to declare a structure containing vertex or edge properties?

Sorry if this is a FAQ. I have done this in the past, but can't remember the exact syntax, and don't have the old code. It is possible to declare a struct and use it to hold vertex or edge properties, rather than using the property_map interface, e.g. struct tagFOO { int length; byte color; }FOO; etc. How can I do this? Where is the doc on it? Thanks Eric