<![CDATA[Non unique Object Names???]]>Hello,

I create and initiate a device with multiple objects with the same name.
No problems, no exceptions, everything works "fine".
But according to the BACnet standard, object names MUST be unique.

Am I missing something?

Thanks a lot in advance.

]]>https://forum.mango-os.com/topic/1162/non-unique-object-namesRSS for NodeWed, 12 Aug 2026 05:05:49 GMTFri, 26 Oct 2012 15:38:17 GMT60<![CDATA[Reply to Non unique Object Names??? on Mon, 29 Oct 2012 19:15:07 GMT]]>Presumably yes, you can change the oid, although oids themselves are immutable.

]]>https://forum.mango-os.com/post/7088https://forum.mango-os.com/post/7088Mon, 29 Oct 2012 19:15:07 GMT<![CDATA[Reply to Non unique Object Names??? on Mon, 29 Oct 2012 19:09:07 GMT]]>Is then the same true when changing an ObjectIdentifier? Or is the latter simply not writable?

Thanks + regards!

]]>https://forum.mango-os.com/post/7086https://forum.mango-os.com/post/7086Mon, 29 Oct 2012 19:09:07 GMT<![CDATA[Reply to Non unique Object Names??? on Mon, 29 Oct 2012 18:18:45 GMT]]>I've added a check for name uniqueness upon adding a new local object to the local device (check into CVS). Note that uniqueness could still be violated by changing the name of an existing object though.

]]>https://forum.mango-os.com/post/7084https://forum.mango-os.com/post/7084Mon, 29 Oct 2012 18:18:45 GMT<![CDATA[Reply to Non unique Object Names??? on Mon, 29 Oct 2012 12:32:44 GMT]]>Yes, it helps, thanks a lot for your response.
I see...
Well, actually, according to the standard, the object name MUST be unique:
http://www.bacnet.org/Bibliography/ES-7-96/ES-7-96.htm
(This is not the specification document, but I have read the same in many BACnet sources)
I don't doubt that there may be good arguments why this is not necessary or maybe even a bad strategy.
However, strictly speaking, if we want to say that bacnet4j implements the BACnet specification, I think it should ensure the uniqueness of the object name.

]]>https://forum.mango-os.com/post/7080https://forum.mango-os.com/post/7080Mon, 29 Oct 2012 12:32:44 GMT<![CDATA[Reply to Non unique Object Names??? on Mon, 29 Oct 2012 09:58:06 GMT]]>As far as I can tell it is the BACnet Object Identifier that must be unique. Although I have noticed that some third party BACnet devices get a bit confused when they see objects that have the same name. Although bacnet4j only cares about the object identifier being unique.

I hope that helps

]]>https://forum.mango-os.com/post/7079https://forum.mango-os.com/post/7079Mon, 29 Oct 2012 09:58:06 GMT