How can I do this in UR?

[xja]

You could type both company names in an attribute, separated by a space and then it would at least show up in a search for either company, but the only way to "browse" to it is to setup a search for Company A and a search for Company B.

Others might suggest creating an info item for each company and then linking to each. That would be good for browsing but it would only show up in a search if you searched Lineage specifically. Linking just doesn't work so well for classification purposes.

What would be nice to have is a hierarchical search (where a search which is a child of another search would apply its criteria to the results of the parent search) so you could set the attributes of an info item (so it is searchable) and then create various virtual hierarchies using search items. Then it would be easy to browse and easy to search. You could create a hierachy by Company>Product and create another by Product>Company, for instance.