Am 11.10.22 um 14:17 schrieb Marc_marc:
Hello, I find that advices about multiple values have inaccuracies between several pages : https://wiki.openstreetmap.org/wiki/Any_tags_you_like#Syntactic_conventions_for_new_values Properties can have a large number of possible values my reading : key=yes/no value aren't a propertie, it's the value for another key (for ex asia=yes/no is not a good idea, it's a value for cuisine=asia
2) Properties can have a large number of possible values key with only =yes/no value aren't a propertie, it's the value for another key
Just want to emphasize that boolean values are really useful and necessary - and in use without being questioned. If you have a property that has the character of a set of features out of a quite small finite set, which exist simultaneously, then you have two possibilities: Using property=feat1;feat3;feat4;feat9 or split that into feat1=yes; feat3=yes; feat4=yes; feat9=yes. Depending on defaults you could simplify in the second method: if feat1,2,3 are yes by default, the tagging could be: feat2=no; feat9=yes. This is the theory, in reality you have it for example in: bicycle=yes and foot=yes and so on. I think the first method is more error prone and more difficult to maintain. If I check an object just for some aspects it's easier to edit just these aspects. And the evaluation can focus on the features of interest instead of parsing through more complicated tags. (Still computers work on 0s and 1s!). If you look at the sometimes complicated discussions about the access=* tags, you can clarify things in cases of doubt easily with additional boolean tags without checking wikipages (often with conflicting definitions in different languages) for the default meanings. It depends very much on the things you want to describe (and the clarity of the main tag), which tagging scheme you choose. (bicycle=yes is clear for highway=*, but very unclear for e.g. tourism=artwork, artwork_type=sculpture, even if the sculpture is a bicycle). Cheers, Sebastian _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
