Selecting Objects from Linked AutoCad File in Revit
Linked Files are symbolic and not native Revit elements. Tags only work on native elements. You could import DWG into Revit family templates and then tag those. You'd have to break up the DWG into unique pieces that you want to tag though.
Another possible approach is to have those files created as IFC exports instead. Revit will convert the IFC into native elements in a Revit project file which might yield slightly more useful elements.
Steve Stafford
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Tags are associated with a category, in this case you'd need to create/use one for Generic Model. Then you have to choose which parameter value you want the tag to display.
Steve Stafford
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Each category as you've realized has its own collection of parameters based on how they are used within Revit. Since the data you're describing is based on fixed DWG entities that are not going to vary (parametrically) you can create your own parameters to store the values you want to include in a schedule. You have a couple options:
Project Parameters: These can be created in the project and can be assigned to one or more categories. Then each family (of the chosen category(ies)) in the project will have this parameter available to display in a schedule. This allows you to store fixed data in each relevant family, but without having to add it to each family itself outside of the project. If you schedule these families you will likely need to filter out families that you don't want to include with your DWG based elements. Filtering is based on parameters too so it could be as simple as filtering based on the type name you use, making sure to a unique name or prefix that makes all your DWG based families unique for the schedule.
Family Parameters created from Shared Parameters: These parameters are defined in each family separately but from a shared parameter file (think dictionary, where parameter definitions are stored). You create a new parameter in each family and browse to a Shared Parameter file (dictionary) and select a parameter (the defined "word"). Shared Parameters are able to be tagged as well as schedule in the project environment, which makes them much more valuable/flexible...though slightly more work.
You can also create a project parameter based on a shared parameter definition.
Steve Stafford
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I took a look at your files. That's a pretty simple form to make in Revit. One extrusion for the base, a blend extrusion for the upper section and a void to cut the holes in the base. If you have other experienced Revit users in the office they could knock this kind of thing out pretty quickly.
As for a video about working with parameters a quick search on You Tube will provide quite a number of them, not to mention the documentation at Autodesk itself.
Steve Stafford
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