Used to densly represent a sequence of nodes that do not have any tags.
We represent these nodes columnwise as five columns: ID's, lats, and
lons, all delta coded. When metadata is not omitted,
We encode keys & vals for all nodes as a single array of integers
containing key-stringid and val-stringid, using a stringid of 0 as a
delimiter between nodes.
( ()* '0' )*
Used to densly represent a sequence of nodes that do not have any tags. We represent these nodes columnwise as five columns: ID's, lats, and lons, all delta coded. When metadata is not omitted, We encode keys & vals for all nodes as a single array of integers containing key-stringid and val-stringid, using a stringid of 0 as a delimiter between nodes. ( ( )* '0' )*