[Talk-us] question: relations & divided highways

Richard Welty rwelty at averillpark.net
Sat Sep 5 02:15:33 BST 2009


On 9/4/09 1:18 PM, Apollinaris Schoell wrote:
... a number of reasons to go with two relations, one eastbound and one 
westbound.

now that i consider it again, despite roles, two relations in a 
hierarchy of super-relations makes a lot of sense.
the resulting topology conveys useful & real structural information 
which otherwise has to be deduced
by examining the role tags. as a developer, i'd prefer the API implied 
by the layers of relations to the API
which involves munging around in a tagged list which arrives in 
uncertain order. as it is, a real API is going
to have to be able to detect and cope with an, um, "assortment" of 
representations, but if i were writing
one, i think i'd try to make it look like the nested hierarchy from the 
outside.

richard





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