The current specification allows cost maps to convey only one type of cost information at a time. It has been pointed out that, in some cases, applications may benefit from the presence of multiple cost-type values in a single cost map (see draft-randriamasy-alto-multi-cost for a detailed description of such use cases) and an extension for allowing that has been proposed.
Possible options (please express and possibly motivate your preference):
1. allow only one type per cost map in the core protocol
specification and define the syntax and usage of multi-cost maps
as an extension;
2. extend the core protocol specification to allow multi-cost
information to be queried and provided in base responses;
3. other.
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Ciao,
Enrico
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