Hi, I want to remove a long list of tags from the builtin-tag-list by different actions. The advantage is that specialised styles that do not need these tags are faster and do consume less memory. == Tags that are no longer used == Tag: osm:id There are only two references in mkgmap source code: HighwayHook sets this tag and StyleConverter that reads this tag. I think this is not an OSM tag but a tag set internally by mkgmap. If so we should rename it to mkgmap:osmid. Any objections? Tag: openGeoDB:postal_codes I haven't found any references in the source code. openGeoDB workout have been removed with locator branch merge. == Tags that can be moved to style handling == I am thinking about moving some static coded rules (e.g. name of a POI street is taken from tag "addr:street") to the style system as it has been done with other location items: mkgmap:street!=* & addr:street=* { set mkgmap:street='${addr:street}' } This has two advantages: 1. Speed improvement for styles that don't use this information. (Marko: this should help you with your need for speed improvements for special styles) 2. More flexiblity: If someone likes to use different tags for a POI street name it is easy to configure that. Possible downside: * Little more memory requirement for styles that use address information The tags to be changed are: addr:street addr:housename addr:housenumber addr:phone (is currently not used in mkgmap) phone is_in == Tags that are used only if --route is set == I am not sure if that's correct. Can someone please confirm that? access bicycle carpool delivery emergency except exception foot goods hgv motorcar motorcycle psv restriction route taxi toll WanMil