[OSM-dev] usernames, keys, and values

[Matt Amos]

On 10/28/09, Anthony <osm at inbox.org> wrote:
> Regarding usernames, keys, and values in the OSM database, are there
> are restrictions on what characters are allowed?  Tabs, carriage
> returns, line feeds, nulls?  All allowed?

i think the current set of allowed characters are those which are in
the XML character range: http://www.w3.org/TR/REC-xml/#NT-Char

this includes \t, \n and \r, but not nulls. to be honest, i can't see
a good use for these characters, but someone out there is bound to be
using them for something ;-)

cheers,

matt