<html> <head> <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#FFFFFF" text="#000000"> <div class="moz-cite-prefix">Hello, According to the given description the "a" is obviously incorrect. Much more interesting question is are the "a." or ".a" legal? One element can't be "separated by a period", so probably the correct sentence shall be <blockquote type="cite"> <pre wrap="">**Bus names are composed of 2 or more elements separated by a period ('.') character.</pre> </blockquote> with best regards, BL On 01/31/2021 11:01 PM, Lawrence D'Oliveiro wrote: </div> <blockquote cite="mid:20210201110148.2128f6ae@theon.geek-central.gen.nz" type="cite"> <pre wrap="">On Sun, 31 Jan 2021 15:15:31 +0300, Igor Plastov wrote: </pre> <blockquote type="cite"> <pre wrap="">It looks like I had found contradiction in bus names rules ( <a class="moz-txt-link-freetext" href="https://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages">https://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages</a>), 2nd naming rule says: **Bus names are composed of 1 or more elements separated by a period ('.') character. All elements must contain at least one character.* 4th naming rules: **Bus names must contain at least one '.' (period) character (and thus at least two elements). * What is the right way of understanding of this two rules? </pre> </blockquote> <pre wrap=""> Follow what libdbus does. It is the reference implementation, after all: ldo@theon:~> python3 -ic "import dbussy" >>> dbussy.validate_bus_name("a.b") True >>> dbussy.validate_bus_name("a") Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/ldo/projects/dbussy/dbussy.py", line 5826, in validate_bus_name my_error.raise_if_set() File "/home/ldo/projects/dbussy/dbussy.py", line 5035, in raise_if_set raise DBusError(self.name, self.message) dbussy.DBusError: org.freedesktop.DBus.Error.InvalidArgs -- Bus name was not valid: 'a' _______________________________________________ dbus mailing list <a class="moz-txt-link-abbreviated" href="mailto:dbus@lists.freedesktop.org">dbus@lists.freedesktop.org</a> <a class="moz-txt-link-freetext" href="https://lists.freedesktop.org/mailman/listinfo/dbus">https://lists.freedesktop.org/mailman/listinfo/dbus</a> </pre> </blockquote> <div class="moz-signature">-- Bogdan Lotko <a class="moz-txt-link-abbreviated" href="mailto:bogdan@lotko.at">bogdan@lotko.at</a> Phone: +43 1 2852458 Mobile: +43 676 6615012</div> </body> </html>