While "key=X" and "X=type_of_X" is a common way of tagging properties of features, there is not a standard way of tagging features that are located within a larger feature.
There are at least 4 ways of doing this: 1) "key=X" -> "X=name_of_smaller_feature", where X is the term for the larger feature. Example: "allotments=plot" is used to define a specific plot within an area of "landuse=allotments" 2) "key=X" -> "key=X_Y" Example 1: "amenity=parking" is used for a parking lot, and "amenity=parking_space" is used for the space to park one vehicle within a parking lot 3) "key=yes" -> "key:namespace=yes" Example: "building=yes" and "building:part=yes" is used to define parts of buildings with different characteristics, eg a different number of levels or different type of roof. 4) "key1=X" -> "key2=Y" Two unrelated keys are used with two unrelated values. Example: "man_made=works" should usually be within a "landuse=industrial" area On 5/22/19, marc marc <marc_marc_...@hotmail.com> wrote: > Hello, > > Le 21.05.19 à 03:25, Tod Fitch a écrit : > > If there is someplace I can read up on this “logic of tag linking”? > > this logic is massively used and yet I had a hard time finding a link > whose content is limited to a line and an example > > https://wiki.openstreetmap.org/wiki/Any_tags_you_like#Syntactic_conventions_for_new_tags > > There's a common pattern of *iterative refinement* in use in many > tagging schemes, which has the advantage that the scheme can grow over > time to be more and more descriptive whilst still being > backwards-compatible: highway=crossing crossing=uncontrolled > > it would probably be useful to better document it > > Regards, > Marc > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging > _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
