Quick question after the Spatial Data on the Web Conference in Amsterdam

Hi All

Back from the Spatial Data on the Web Conference in Amsterdam I've got a quick question for you.

First a quick introduction. I'm working as project coordinator at swisstopo, the Swiss Federal Office of Topography, in charge of the development and maintenance of the Federal Spatial Data Infrastructure.
Some of our customers are currently interested in investigating the potential offered by the Linked Data approach to geographic information.

Here at swisstopo we are interested in GeoJSON-LD, since our SDI is entirely based on a REST API. Then the question about the "geometry" object in GeoJSON.
As far as I can understand the specifications, when I model a feature object I have to use the geometry object, with the restriction to only one geometry object.
Is that right? Have you considered that sometimes geospatial features may have more than one geometry property? For example a city can be represented as a point or as a polygon depending on the scale of visualization.
Your thoughts about this?

Many thanks and looking forward for an answer.
Sincerely

Pasquale Di Donato