Hi, some of you might know my proposal http://wiki.openstreetmap.org/wiki/Proposed_features/Extended_conditions_for_access_tags
or its predecessor, "Conditions for access tags". The proposal presents the idea of adding conditions to existing keys (such as maxspeed, access ...). A tag with conditions will only have an effect if all conditions are valid. Something like this is necessary to describe many traffic restrictions encountered in reality: restrictions only valid on wet roads, at night, ... The original proposal suggested using colons (":") to separate conditions from the base key and each other. However, recently discussed tagging concepts as well as the extensions introduced after the first proposal have demonstrated some problems with that syntax. Most importantly, colons * are used by the {{tag|opening_hours}} syntax which imo would be a good choice for timed restrictions * are used as a namespacing solution and some recent ideas (such as left/right ordering) might also use colons as a separator * are used in situations where the order of key components matters. The order of conditions, however, is semantically irrelevant. Therefore, angle brackets ("[ ]") have been suggested on talk-de as an alternative to using colons. Please state your opinion in the poll on the proposal's wiki page: Which syntax do you prefer? Tobias Knerr _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk